Lumia 1520 - poor 5GHz Wi-Fi performance

Hi
I am getting much slower than expected Wi-Fi performance with my Lumia 1520.
With my Asus RT-AC66u (Broadcom 802.11ac chipset) on 5 GHz band, I typically get only 10-15 Mbps throughput (downlink or uplink) on Speedtest, whereas with Nexus 5 (exactly the same scenario, and in fact the same Qualcomm chipset inside) I get 70-80 Mbps.
(I have a 100 Mbps fibre connection to the internet).
I have tried some other Access Points and the throughput seems similarly low.
My previous Lumia 920, connected to the same Asus AP, is able to get at least 40 Mbps (it only supports 11n, and probably the rate is limited by the CPU speed), so something is clearly sub-optimal with the Lumia 1520.
Has anyone else noticed this? Hopefully it is a driver issue - if so could Nokia confirm it?

Mine is even worse. The phone does not detects any 5GHz signal. I'm using a dual-band TP-Link router. No 5GHz signal at all. Only 2.4GHz signal is detected. All my PCs, Mac and my other phone having no problem with my router 5GHz signal except my new Lumia 1520.
Nokia 3310, 8250, 6070, 6060, 3120, 1110, 1280, 5300 XpressMusic, N76, 6120 classic, 5800 XpressMusic, 5530 XpressMusic, N900, C3-00, N8-00, N9, 700, X2-01, Asha 302, Lumia 610, Lumia 920, Asha 501, Lumia 820 and Lumia 1520...

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Lumia 1020 - Poor Performance

This issue is fairly intermittent. I've had the phone since the week it was released in the UK and it's always had pretty decent performance in day to day use (Same with all the Windows Phone devices i've owned over the years).
However, recently my Lumia 1020 has a number of performance issues.
I am currently running the developer preview, but i've done this for a long time and not had issues like this. I'm just wondering if people have experienced any of the below (There are other times it will just generally become unresponsive to input, these are just a selection fo them).
I'm going to wipe the phone today, but thought i'd check in case others are having the same problems. I don't think it's a hardware fault, but it does seem like some sort of background task is taking up resources. I've tried removing any apps I don't NEED to use on a daily basis but it still has the problem.
I know i'm running developer preview...So I'm not moaning about the performance of my phone here (Although some builds through the dev preview ARE final code as far as I know), I just want to see if anybody has experienced the same problems and hopefully fix them.
Scrolling through the start screen tiles are slow to show their contents. Sometimes the icons take 10 seconds to load. And when I move from the top of the start screen to the bottom fairly quickly, I will sometimes just end up with a black void (The Arrow at the bottom to move to the Apps list is visible.
Getting into my camera roll from the Nokia Camera OR Nokia Camera Beta apps can sometimes be excruciatingly slow. I'm not talking a little annoying, but put down your phone and go get a coffee whilst it loads. It generally makes WP look bad if i'm trying to show somebody a picture I just took.
Sometimes i'll tap a letter in the All Apps list, and the phone will just lock up for 10-20 seconds before showing the list of letters.
Returning to the start screen sometimes shows "Loading..." or "Resuming..." for a long time (IMO it shouldn't do this at all, and never has in the past)
Loading the camera app, or apps in general can take a painfully long time. Sometimes with apps like Skype when the phone eventually becomes responsive again the app crashes.

I've tried that but it doesn't seem to help. I'm pretty sure when scrolling through the start screen (Except maybe right after the phone has started up) the live tiles should be instantly visible.
I just got the Cyan update this morning, which I think puts me on the current latest stable release, as far as I know. I'm going to try doing a full reset on the phone (Should still keep me on the dev preview build w/ Cyan I believe?)
Since getting the Cyan update, it hasn't made a difference.
I am going to try a full reset of the phone, and if it's still performing this way i'll use the recovery tool from Nokia to roll back to the latest "retail" build. I'll lose Cortana until the UK 1020's get Win 8.1 Update 1 but it could fix my problems perhaps.

Lumia 1520 Battery Discharge Issue After Updating ...

After updating to Denim, my Nokia Lumia 1520 started to experience the following symptoms:
Phone charges to 100%, I disconnect and use an app like Instagram BETA, Internet Explorer, Lumia Camera, or any game--after no more than 5 minutes of use, the phone gives a "Critical Low Battery" alert and shuts down. If I try to restart phone immediately, it makes it to the AT&T splash screen or lockscreen and then same battery message appears and shuts down. If I wait 10-15 minutes after the shutdown to restart phone (without recharging) the phone will stay on, but battery level will report to be in the low 20s or 10s (whereas no more than 20 minutes ago, it was 100%).
When phone is at 100% battery: I take 2-5 photos or record mere seconds of video and I get the same "Critical Low Battery" alert. Upon restarting, some of the photos or video are nonexistent or corrupt files and battery level is reported at 2-5%.
However, if my phone is plugged in to charger, none of these "Critical Low Battery" alerts come up and I am able to use phone as usual. Considering that I cannot take a vacation and capture nature's beauty with an AC adapter always connected, this is a serious drawback.
Steps I've Taken:
Soft-reset
Full factory-reset
Moved all apps off microSD card (this improved situation maybe 5%)
Disabled almost all background app use in Battery Saver
Replaced microSD card when I thought this was a memory write/read issue
Installed "Battery" app to monitor battery use. After 750 data points were logged, my average battery life is reported at "16 minutes," which sounds about right.
My warranty should be expired since I purchased the phone December 2013, so I'm checking in here if anybody has had any luck with battery replacements or with a solution to this issue? At the same time, this issue arose strictly after updating to Denim and I've seen other users report this EXACT scenario. Is there any hope for Lumia 1520 users on this?
Other reported cases:
Battery Issue after Denim update: http://forums.windowscentral.com/nokia-lumia-1520/347112-battery-issue-after-denim-update.html
Battery critically low and shutdown: http://forums.windowscentral.com/nokia-lumia-1520/342343-battery-critically-low-shutdown.html

Hi albertico, TeJazz, and Samgh. Welcome to the Microsoft Mobile Community. We understand your situation and in response to this issue, we suggest that you perform the suggestions in the photo attached. If the issue persists, we recommend recovering your phone's software using the Windows Phone Recovery Tool. This link will work regardless of your location. If the same thing happens, it's best to take your phone to the nearest Care Point in your area for evaluation. Backup first to avoid data loss.
Attachments:
Battery drains fast.JPG ‏147 KB

Nokia Lumia 1520 video recording on Microsd card i...

First off, I have a Nokia Lumia 1520 for about one month now. I love the screen size and everything. My picture/video recording to phone memory works fine. I have recently purchased a Class 10 Sandisk Pixtor 64GB microsd card from Best buy for video/pictures storage due to this device having only 16GB of memory.
http://www.bestbuy.com/site/sandisk-pixtor-64gb-microsdhc-class-10-memory-card/1299201.p?id=12190475...
Picture taking is fine writing to this card. However, I noticed that on all video recording mode (720p to 1080p), the video would sometimes skip and lose a few frames here and there. For example, when i try to record a video of a kid running, the video playback will show the kid run across but would jerk or freeze a bit during his run (almost like the phone is too busy doing other tasks during recording). Playing the same videos on a computer show the same result which means the video taken were bad to begin with. My temporary fix is to switch video/picture recording to the phone storage itself but that defeats buying the sd card in the first place.
Anybody else having this issue? I couldn't find another microsd card to test but i wonder if the phone itself is having a performance issue with sd cards in general. Should i engage with tech support from Nokia?

It is quite well known that Class10 card are overkill on a mobile phone and in many cases have been proven to actually have worse performance when compared to even Class4 cards.
Class10 cards really only make sense in (high end) DSLR ca,eras where itis a requirement the shots can be written to the card fast. In practical use the class only indicates the card cab sustain a transferrate of X MB/s and with that in mind a Class4 card even will be plenty fast for your mobiel phone.
Due to the fact a Class10 card is basically overspec for the hardware it may even cause timing issues.
Click on the blue Star Icon below if my advice has helped you or press the 'Accept As Solution' link if I solved your problem..

Nokia Lumia 1520 Overheating & Battery Drain after...

Hello,
I've been experiencing an intermintent problem with my Nokia Lumia 1520 (AT&T, 16GB model) where my phone overheats and the battery drains. The problem started after I upgraded to Windows Phone 8.1 and Lumia Cyan. As of now I haven't figured out a good step by step method to reproduce the problem on demand however I have noted that when this problem occurs and I wake the phone and unlock it the Start screen shows a never ending or unusually long "Loading" message and my phone will overheat and drain the battery. So far the only way to mitigate the problem is by shutting it down manually or performing a "soft" reboot of the phone. Afterwards the problem gets resolved and the phone resumes normal operations after rebooting with the phone returning to a normal temperature and battery drain rate that is consistent with the use it is being given.
Given that I don't know anyone else carrying a Lumia 1520 has anyone seen something similar to the problem I am describing on this post with their Lumia 1520 unit after updating to Windows Phone 8.1?
So far the only big resolution step I've taken is to perform a complete phone reset and not recovering the phone from my back ups, effectively making it a "new" phone in terms of settings and software conditions.
My theory for this problem is that it is software driven as an overheated phone and a stuck "Loading" message instead of the Start screen after unlocking the phone indicates that a software process (either OS or separate Application) may be behind the issue.
Thanks for any assistance on this matter!
Michael
Nokia Lumia 1520 | Windows Phone 8.1 "Lumia Cyan"

Morpheusprime wrote:
Did not work unfortunately... But I have resolved my overheating and battery drain issue...
CORTANA is the culprit and needs to be unpinned from the start screen.
Here is the process if CORTANA is piined already..
1) Unpin CORTANA
2) Go to "Settings.. Applications and open Cortana
3) Turn off Cortana
4) Phone will RESET
5) Go to "Settings.. Applications and open Cortana
6) Turn on CORTANA
DO NOT PIN TO START SCREEN
7) Swipe your start screen over to your applications
8) select CORTANA and allow it to set it self up again.
Now CORTANA is still accessible by the Search icon or from your application menu.
Now your battery.. Before the update my battery was reading "1 day, 14+ hours"
After update After recharge I was getting 14 hours then it would start draining.
After taking CORTANA off the start screen my phone stop getting hot near the camera (Upper left) and after 2 days (Battery cycling) my battery has returned back to reading "1 day, 14+ hours"
My assumption - The matter will be resolved with the Lumia Denim update coming later this qtr.
When that arrives my understanding is CORTANA is off BETA in US. Some additional Firmware tweaking, along with the camera updates and more.. Which "SHOULD" resolve this battery drain & over heating with CORTANA
Per my experience, I believe you're right that Cortana is the culprit for the problem described by the original poster. I unpinned Cortana from my start screen 6 days ago, and so far so good. I have not had a recurrence of that problem. I did not turn Cortana off and then back on again though. I just unpinned it, and that seems to have done the trick.
I'm also hopeful the Windows Phone 8.1.1 and Lumia Denim update will fix this since Cortana will be off Beta in the U.S.

Can Anyone help save my Nokia Lumia 1520?

Hello I am in need of help to save my Lumia 1520. I made the mistake of flashing my lumia 1520 (RM-937) with a lumia 1520 (RM-938) rom. Ever-since, my phone started acting out. The phone is stuck in aiplane mode and does not connect to GSM network anymore. I flashed the phone back to its original firmware which is a hong kong country variant rom using Nokia Care and Windows phone recovery tool. I performed a hard reset after flashing the phone back to its original firmware and updated the software still no change. Any suggestion would be welcome!!!

Unfortunately in this community we cannot comment on unauthorised procedures like the ones you have already performed on your Lumia 1520. The only advice I can give you is to take your handset to a Nokia Care facility and do NOT tell them what you have done to the handset, just describe the faults you are currently observing.

Denim Update for Lumia 1520

Why can't a flagship device like Lumia 1520 get the latest updates ? What's the point in purchasing the top of the line products if no support is provided. How can Microsoft retain its loyal customer with such a poor service? What is the point of advertising features like Lumia camera 5, 4K video and Cortana if we cannot use them. It looks like Microsoft is dumping earlier Nokia branded phones.

Hello have a 1520 Lumia with HK ROM and I have not yet received Denim, on the microsoft web site indicated that as there are Denim but my phone still says that it is updated.
This is the page:
http://www.microsoft.com/en/mobile/support/software-update/wp8-software-update/wp8-availability-in-...
However, there are other specific page of this model where otherwise indicated, all that is this:
http://www.microsoft.com/en-hk/mobile/support/product/lumia1520/softwareupdate/
There is a problem that I think Microsoft should solve, there are many users of this great terminal that are like me in any way.

Nokia Lumia 1520 troubles

I purchased the Lumia 1520 6 months ago because of its large screen. When I asked about a case or screen protector, the store I purchased it from had none and directed me toward the department stores and online. The department stores do not support this paritcular model and I do not buy online for security reasons.
Three months into the phone I dropped it and the screen cracked. To my surprise, the whole unit had to be replaced. This was a big disappointment, however, I did not have a cover or screen protector for it so I swollowed my pride and used my insurance to replace the broken one.
Three months later and an expensive, but cheeply made protector later, I dropped the phone again and the screen was way beyone usage. I quickly went to the store I bought the 1520 from and replaced it with a model that is not a Lumia.
Other than learning just how well my insurance worked in all of this mess, I learned all about a Windows based phone and how poorly they are supported in the marketplace and their range of apps are far inferior to that of an Android based phone.
From now on I will be staying away from phones and tablets that do not have accessories available at the big chain stores.

There are no perfect screen protectors for phones like new iphones and most of high end lumia devices like 1520 as display is curved 2.5D and regrading your drop phone incident I guess the big screen phones like 1520, iphone 6 plus etc are more prone to display glass shatter when they are dropped on hard surface so you might need to buy protective case for it.

Lumia 1520 does not support Bluetooth Keyboard (HI...

I would very much like to buy a Lumia 1520 as it would spare me from carrying both a phone and a tablet.
However, I am not going to as, for reasons which utterly defeat me, the Bluetooth stack does not support a keyboard. The HID (Human Interface Device) aspect has not been included.
I am utterly baffled by this simple omission. From my Nokia N95 through to my N8 I was able to use a keyboard. I even still have a Nokia one which folds.
Would someone from Nokia be good enough to:-
a. let me know why this bit of simple but basic functionality has been left out?
b. when, if ever, it is likely to be included in an update?

Agreed on all points -
1. Lack of HID support is a glaring omission that needs to be fixed
2. Microsoft is responsible for omitting HID support (which existed in Windows Mobile 6.5!)
3. There is hope for the future when Nokia/Microsoft collaboration is tighter after the merger.
As mentioned above, a WP device can see a bluetooth keyboard - it can even perform the pairing handshake. It generates a random code, you enter the code on the BT keyboard, the two become paired. But then nothing.
I can add a little insight to this conversation: If you were to ask Microsoft folks, the answer would probably go something like this: "We have a finite number of resources. So to support one feature, we'd have to cut something else. What feature would you be willing to lose in exchange for HID support?"
I am basing this on similar conversations I've seen on MSFT discussion boards about support for entire-device backups - not piece-meal app-supported "in the cloud" data storage, but total backup/restore functionality.
I personally think it is embarassing that Windows Phone does not support the HID profile. I know we're getting close. The code is already on Windows RT for tablets. So I sure hope it's in the pipeline for WP. Time will tell I suppose.

Nokia Lumia 1520 overheating

i have 1520 and it overheats, but after usage of any app after 5 min top up corner is going insane heated
Moderator's note: We amended the subject so other users can easily identify and answer the concern.

Hello, brooklands. Is this for a Lumia 1520 as well? Smartphones like Lumia devices may get warm when multitasking, charging, or using heavy performance apps. However, it should quickly cool off. There are systems in place to restrict power consumption to essential features if the phone does become excessively hot. Since the issue only happen when using certain apps, have you tried isolating the case through several troubleshooting steps? If those apps are downloaded ones, have you tried removing them and see if it'll help?
If you still believe that the phone is too hot, you might want to consult a Care Point where it can be checked to see if there is a genuine cause for concern. Find one in your area by clicking here: http://www.microsoft.com/en/mobile/support/locations/.
For the screen issue, try doing the steps shown here and see if it'll help improve the phone's performance: FAQ - My Lumia touch screen is not responding or is responding the wrong way. The info given in this link can be used for queries globally.
Let us know how it will go.

Nokia Lumia 1520 Screen Glitch / Random Things Hap...

So it's kind of hard to explain, but my lumia 1520 was fine when I first got it, but sometimes I can't press anything on the screen, and there are times where bing search will just activate, or it will open up the "listening" function, or it willl just do crazy things. like it's being "hacked" haha. I know it's not, but it just gets so glitchy, i've tried soft reset, and hard reset, and have restored from backup, and nothing seems to work, I recently restored from a backup from several months ago with my old lumia 1020. so far so good, but it will probably start to glitch out again. I don't want to resort to "start afresh as a new phone" because i'm pretty sure you will lose everything? like..contacts and things? hope someone has an answer or has had similar troubles

Welcome to Microsoft Mobile Community, hogsrule. Have you tried the suggestions of adrianhughes? For the best experience with the Lumia 1520 touch screen, in case you have the same phone model, we encourage you setting the touch sensitivity to normal. To change touch sensitivity, select Settings > touch > Touch sensitivity > Normal. We're hoping that your phone's performance improved by doing it. All the best!

Lumia 1520 camera error

My lumia 1520 camera is always going black and sometimes it goes black and purple lines. I can't capture anything. I brought this from another country and now i haven't warranty in my country please help me to fix this.......
I'm not perfect in English so i think you can understand what I'm trying to tell... Please help me

hi mate, u will need to get in touch with your retailer that you bought it from and demand a replacement. otherwise try performing a hard reset first and if that doesn't work, then use Nokia Software Recovery Tool.

Headsets for Lumia 900 (and lumia 1520)

Hi
I currently own a Lumia 900 which I mostly use with Plantronics Bluetoth - and it works fine.
Now I try to use it with my Razer Kraken Pro and it does not work at all - very low and scatchy noise - and if I try with my wifes headset (an iPhone compatable headset) its the same story.
Both of the headsets work fine on my wifes iPhone but works poorly on my Lumia 900.
Why is that ?
I expect to buy the new lumia 1520 when it arrives to Denmark in the start of 2014 but can I expect the same headset issues with that model ?
best regards

Nothing wrong with your phone. iPhone headsets only work with iPhones.

Lumia 1520 Discharges 18% per hour in standby with...

When we first got 1520 6 weeks ago, battery performance was pretty good but now
1. Lumia 1520 Discharges 18% per hour in standby with no background tasks runinng
2. Took 1520 back to Microsoft Store and have now had 2 replacements and all behave the same
Discharge between 18 and 22% per hour - no data, no tasks running and phone not even being used

Thanks for those who replied - so the issue is now basically solved
What we did was :
1. Reset phone
2. Setup phone as a new phone and did not download any of our purchased apps from Microsoft Store
3. Voila - battery now behaves perfectly - discharge rate is 2.53% per hour - down from over 18%
4. So although - we never had any apps runnig when the battery was discharging at 18% - we surmise that some app was behaving badly
5. Now all we need to do is to find out which app was the culprit
Thanks again to forum members for their input

Handset Insurance Lumia 1520 : Horrible Experience

Hi,
I logged in an insurance claim for my Lumia 1520 on 30th June. First I am told that the handset would be repaired and returned on 8th August. Now I'm told that it will be repaired on 26th August !!! Reason given to me is non availability of spares !!! Extremely poor experience at the call center with my call disconnected 3 times ! Why does Nokia want to tarnish its brand my associating with such a poor customer service experience !!!
Very disappointed by my favorite brand !!!

That is weird. You should get in touch with Nokia Care https://twitter.com/NokiaHelps
I love Nokia and windows phone.

Lumia 1520 - poor 5GHz Wi-Fi performance

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