After 4.2.1 Dropped/Choppy calls and poor signal / Gets hot / Battery Life is bad when talking

What is this APPLE? I can see the Iphone 3G is old and no more support but atleast make a working OS and then go out on a high note. Instead of leaving us hanging with a broken phone. Not just me , scores of others have these very same symptoms. Also I wish there was a way to go back to an older OS , one  that worked %100 for my phone.
Dropped/Choppy calls
Get REAL warm
Batterylife is crap only when talking
Never had these problems before 4.2.1 , it's like night and day. I was hooked on the Iphone since I bought this 3G brand new and its ease of use but Ill tell you one thing....
Im not under contract right now with anyone
I WILL NOT be buying a phone/contract with APPLE as long as 4.2.1 is left in our "lap".
I WILL be buying another smartphone if this is what we are left with. I was going to treat myself and buy the 5G with a contract to make it cheaper but as of now
Im feeling "used" by APPLE and not going to take it.
I know some might come here and post ..
"Me and others aren't effected by 4.2.1 , must be your phone"
BS! It was night and day when I downloaded/installed 4.2.1. This is NOT my Phone and IS the firmware. And my friend that is a phone nut said he didn't download 4.2.1 because of all the problems he was hearing about it, I should have done research. He said the biggest hit was the 3G and he can't belive I installed it.
APPLE DO YOUR JOB AND FIX THIS. MAKE 4.2.2 ATLEAST AND FIX THESE PROBLEMS!! IF NOT THEN WE MUST PART WAYS.
                                                            DamianJP

Cool
Did the new device and didn't do a restore from backup. Grabbed all my contacts from windows contacts saved list. So only thing the same on the phone was the same 4.2.1 that stays in there. Still bad signal and battery life, although the battery problem might be the age of the battery since its the same battery that came with the 3G.
I did the Field Test mode program
http://socialtimes.com/find-your-iphones-signal-strength-using-the-hidden-field- test-mode_b4690
- Open the iPhone’s dialer keypad
- Enter *3001#12345#*
- Press the Call button
-80 to -70 dBm: Reasonably strong signal
-107 to -90 dBm: Weak signal
-113 dBM: No serviceable signal
In my house im getting any were from -100dBm to -117dBm ( 1 to 2 bars with 3G)
Outside Im getting -85dBm and up. (2 to 4 bars with 3G)
I have to do more testing to get solid numbers though. I got almost full bars all the time if I switched to EDGE.
(4 to 5 all the time with EDGE). That makes me think that with the problem in 3G , it's the OS. Since ALOT of people saying  that there 3G drops or is bad since 4.2.1.
Now I looked around and I playied with all my settings to insure that my battery should not drain thru improper settings. So I think given this is the original battery , it might be a good time to try and install a new one from here for $17.
http://www.iphonebatteryrepair.com/iPhone-3G-Battery-p/bat-1001.htm
Iv'e opened Iphones before (fixed my friends 3G) after he dropped his and the vibrate/silent button's screw came loose and he could not change it off silent mode and replaced a battery in my other friends 3Gs. SO i feel comfortable in there.
I dont know if the bad battery could be reducing my signal.Ill try the battery cause it's only $17 (Cheap investment) and because my battery life under a load drains it fast. Again I don't know if it's the OS or the age of it.
I was thinking maybe a poor contact/condition of my SIM card could be another possibility. I wonder if and how much a new SIM card from a AT&T provider is. I heard people saying you can get a new one but Ill have to ask my local AT&T dealer.
Although this seemed so odd how it all happened the same night till now RIGHT after the 4.2.1 OS install and all the others people saying the same symptoms.
Ill keep working with it and give you (and others users here) updates in my progress  for the people who are in the same "boat" as me.
By the way I haven't tried to make Itunes re download the OS by deleting the file in the directory you gave me above. Ill try that as soon as I post this message.
Also Iv'e noticed that theres a way to download a older version of Firmware OS and put it in a certain directory and use the DFU mode (Deep Firmware Upgrade) on the Iphone to force the Iphone to re install the current version or an older version ( whatever version you download) of firmware. Now Im very worried that this might mess my Iphone up to were it wont even work so I really dont want to try this right now or until I exhaust all my other options. I have to do more research of this method.
Sorry for the long post but I think I kept it faily organized for a easy read, I hope.
                            Thank You Ingo !!
                                        DamianJP

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