My iphone 4 Carrier signal is very weak just shows one bar and often shows No Service followed by searching and again one signal bar I have had a lot of drop calls, I have tested the sim card on my Samsung Ace which shows full Signal strength I am on the
My iphone 4 Carrier signal is very weak just shows one bar and often shows No Service followed by searching and again one signal bar I have had a lot of drop calls, I have tested the sim card on my Samsung Ace which shows full Signal strength I am on the latest iphone firmware 5.1.1 with 4.12.01 baseband I have tried resetting the iphone did o full restore twice. I guess there is something wrong with the iphone hardware? Has anyone had similar issues and how they fixed it?
Take the device to Apple or an Apple authorized service center and let them check it out.
Similar Messages
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I want to factory unlock my iphone 4s vodafone.....i am in pakistan now and none of the sim cards are working so i need solution
<Personal Information Edited by Host>Only the carrier the phone is locked to can authorize the unlock. You will need to contact Vodafone to see if you qualify for an unlock.
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HT2309 Do I need to power off the iphone 4s before remove the sim card?
Do I need to power off the iphone 4s before remove the sim card?
Thanks, I think so, too.
But Apple says "When changing the SIM card, power off the device prior to opening the SIM tray" in http://support.apple.com/kb/ht2309. -
A refresher: what actually is the SIM card for and WHY is it removable?
I am sure that this topic has been addressed before. However, since I am a bit familiar as to WHY smilar SIM cards are removable and changeable in, say, European phones, I am wondering WHY the iPhone has one, and what purpose does it serve especially since the iPhone is so closely related to its own particular flavor of ATT service..
Thanks!
- Roger TA SIM card or Subscriber Identity Module is a portable memory chip. The SIM card makes it easy to switch to a new phone by simply sliding the SIM out of the old phone and into the new one. The SIM holds personal identity information, cell phone number, and on some models of phones, teh phone book along with other data. It can be thought of as a mini hard disk that automatically activates the phone into which it is inserted.
A SIM card can come in very handy. For example, let's say your phone runs out of battery power at a friend's house. Assuming you both have SIM-based phones, you can remove the SIM card from your phone and slide it into your friend's phone to make your call. Your carrier processes the call as if it were made from your phone, so it won't count against your friend's minutes.
If you upgrade your phone there's no hassle involved. The SIM card is all you need. Just slide it into the new phone and you're good to go. You can even keep multiple phones for different purposes. An inexpensive phone in the glove compartment, for example, for emergency use, one phone for work and another for home. Just slide your SIM card into whatever phone you wish to use.
High-end cell phones can be very attractive and somewhat pricey. If you invest in an expensive phone you might want to keep it awhile. Using a SIM card, it is even possible to switch carriers and continue to use the same phone. The new carrier will simply issue you their own SIM card. The phone must be unlocked, however, and operate on the new carrier's frequency or band.
A SIM card provides an even bigger advantage for international travelers -- simply take your phone with you and buy a local SIM card with minutes. For example, a traveler from the U.S. staying in the U.K. can purchase a SIM card across the pond. Now the phone can be used to call throughout England without paying international roaming charges from the carrier back home.
SIM cards are used with carriers that operate on the Global System for Mobile Communication (GSM) network. The competing network is Code Division Multiple Access (CDMA), a technology created by U.S. company Qualcomm. As of fall 2005, CDMA cell phones and CDMA carriers do not support SIM cards in most parts of the world, though this is changing. A CDMA SIM card called the R-UIM (Re-Useable Identification Module) was made available in China in 2002, and will eventually be available worldwide. Expectations for the future include a cell phone market that supports both SIM (GSM) and R-UIM (CDMA) cards by default. -
HT1438 how do i remove the sim card?
how do i remove the sim card from an I Phone 4?
There is a slot/tray on the right side of the iPhone. You can open it with a special tool that comes with some iPhones, or you can use a paper clip to push the release in the hole on the tray. Push GENTLY.
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How can i open the cover to remove the sim card?
I want to open the cover to remove the sim card. How can I open it?
use a paper clip or the SIM card removal tool that came with the phone.
Read the manual as well: http://support.apple.com/manuals/ -
I lived in China when I bought the IPhone 4s with China Mobile. It is prepaid so I have to put money on my phone when it runs out. Now I'm living in Mexico and I was wondering if I could keep using my IPhone with the mexican carrier TELCEL. Can I just insert a new SIM card from this company? Or does it have to be unlocked? BTW I had no contract with China Mobile. Thank you in advance:)
Could it be because the SIM card got damaged while I cut it to fit the IPhone?
Very likely. Hard to believe the carrier in Mexico doesn't have a micro-SIM card available.
Or somehow the Chinese carrier found out and locked it?
No, which is not possible.
What can I do? Get a new SIM and see if it works again?
Get a micro-SIM from the carrier in Mexico that you don't have to manually cut down. If that carrier doesn't provide one, switch to another carrier that is not so low-budget. -
I just got my iPhone unlocked in Pakistan. Now I want to insert another company's sim card in it, which is not supported of course. It is reading the sim card but shows no service. Plus I plugged it into itunes so that i could confirm it. But the phone number is n/a
Have you loaded the unlock onto your phone yet?
If yes: connect to iTunes to load the up-to-date carrier settings of your phone.
If that does not work navigate to settings>general> reset>reset network setting and confirm that.
If that does not work have your SIM replaced.
If no: backup your data, then navigate to settings>general> reset> reset contents and settings and confirm that your phone will be reset to factory settings. Then set it up again and load your backup. Now you have loaded the unlock.
If all of that does not help contact Apple to check if the carrier has really done the unlock. And if you have not doen an official unlock, but a jailbreak there is nothing I can do for you. -
I wanted to know how to unlock my iphone, since I had to restore it and when it restarted, it appeared this message: "The SIM card que you currently have installed in this iphone is from a carrier that is not supported under the Currently actuvation policy that is assigned by the server activion. this is not a hardware issue with the iPhone. Please insert another SIM card from a supported carrier or request que this iphone be unlocked by your carrier. Please contact Apple for more information. "
I need help, I use my phone for everything enclusive to work. I appreciate if you can help. I'm from Brazil. My name and giullia.Did you purchase this device from Apple or an authorized reseller? It sounds as if you had a device that was jailbroken/hacked to operate on your carrier. Upon updating the iOS, it is now locked back to the original carrier the device was locked to.
Only the carrier the device is locked to can authorize an unlock. You will need to make contact with that carrier and see if they provide unlocking services, and if they do, if you qualify for an unlock. Otherwise, you are out of luck. One that carrier can take care of the unlocking. -
i unlocked my iphone 4 factory and i upgrade to 6.1 when i connect it to itunes it apears
The SIM card inserted in this iPhone does not appear to be supported
This iPhone is not currently setup to work with carrier you're attempting to use. Please insert another SIM card from a supported carrier or request that this iPhone be unlocked.It sounds like you or someone else hacked the phone to unlock it. Updating it locked it to the original carrier.
How did you unlock it? The ONLY legitimate way is to ask the carrier it is locked to to unlock it. Any other way requires hacking or jailbreaking the phone. -
i Traded my friend my galaxy for her iPhone and checked the compatibility for Net10 online. It said my phone would work and I even got it activated with net10 but when I put the SIM card in and reboot my phone it tells me the SIM card I have installed is from a carrier not supported by the activation policy....how is this happenning when the website told me my phone was compatible and no the phone was not jail broken
Verizon does not unlock the iPhone 4S for use on U.S. GSM carriers, only for foreign roaming.
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i just got a new iphone 4 for att and my friend installed the sim card in it for me. the imessage function isnt connecting with the my cell number. a while back i had logged into my apple account on someone elses cell phone and their number keeps showing. when i try to just select my number to send and recieve imessages from it will not show up. i can send and recieve regular text but not pictures or imessage. i have tried logging off and restarting and nothing has worked.help please!!
Did you remove your account information from the other person's iPhone?
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my iphon 5 said "only compatible sim cards from a supported carrier may be used to activate iphone. please insert the sim card that came with ur phone or visit a supported carrier's store to receive a replacement sim card" what do i do??? i leave in diferent country now!!!???(((
in many countries to make phones seem less expensive
carriers pay most of the phones price for the customer
but this come at the cost of the phone only being able to work
with the carrier this is called a sim lock
the only people who can remove a sim lock is the carrier which
the phone is sim locked to they been doing it like that for at least 20 years -
Which option do I have to select If I buy the latest iPad with cellular feature for international use? If I choose verizon can I just change the sim card and insert one from another country?
I would guess you need the A1460 model
see here
http://www.apple.com/ipad/LTE/ -
The SIM card inserted in this iPhone does not appear to be supported.
The SIM card that you currently have installed in this iPhone is from a carrier that is not supported under the activation policy that is currently assigned by the activation server. This is not a hardware issue with the iPhone. Please insert another SIM card from a supported carrier or request that this iPhone be unlocked by your carrier. Please contact Apple for more information.Or if you've recently got the phone unlocked then you'll need to connect it to itunes and then do a fresh restore to unlock it ,although for most users simply connecting to itunes for few seconds did the trick.
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