iPhone 4S dropping network and data at random

Dear Thomasgrox

I got succesfull update to 5.1b3. Many thanks

Hi!After twodays of usingbeta3, it wasallgood, but onthe third day ofthe old problemshave arisen((((

Man sorry to hear that...

The only good thing about this is that I'm more convinced that the problem is software related. I really hope the official 5.1 fixes it all because it's quite discouraging to continue on a phone that can't work as a phone.

I'm on beta3 for about 24hrs now without any problems.

What problem returned for you and is the phone fine again after you resolve it/them?

Updates to B3, problems seem to have disappeared. 2 days and its all good. Keeping my fingers crossed 😐

Looking good here too. The connection has not dropped once and the battery lasts longer. Without this update, the phone is sometimes unusable. Apple should release this update as an interim for all 4's right now.

None here seem to share your misfortune. Hasn't been 3 days here yet. Will report back if I get strange problems.

I have same problem. I used ios 5.1 beta 3 and everything was fine for about 5 hours. Then same things happen again. Showing a full signal bar but cant make calls , then signal drop, searching, full bar. Im pretty desperate

And I need to say that i have my 4S since early november and everything was fine until january 2012. I only have problems since the new year.

I have no clue what could go wrong

Same problem here.

I'm using Vodafone, changed cut SIM to Micro SIM, restored the phone. Same result. Can't do calls or SMS, can receive sometimes, the phone searches for the signal constantly (even in good 3G signal areas), changes to No signal many times a day, and occasionely reports a SIM Failure.

The battery life, however, has increased from something like 2 hours in the beggining to a full day, but I switched off everything. I'm now stuck with this extremely expensive wanabe phone for the next two years.

Guys who are facing problem even after upgrading to B3 - Could you Disable 3G from network settings ? It could well be due to the 2G-3G network conflict. I had gotten by 3G disabled by my service provider !

My problems are same , no matter if I have 3G disabled or not. I think that with 3G disabled call failed problem is even more frequent.

But I have. no sim failure or invalid sim problem since upgraded to beta 3. It has been 2 days now.

Hope 5.1 will fix everything, If not I will ask for exchange

5.1 solved SIM ISSUE, but it drains battery fast!

With sim card from another provider ALL is ok, no battery drain and no sim failure.

So I think it still sim holder and/or sim contacts problem.

But I am not using iphone anymore, so I dont care. Thanks apple for "QUICK" solution.

Once they fix battery drain, I'll sell it on local market.

I have Vodafone too, have had the same troubles just like you and many others. I currently have my iPhone in the service for the second time. In the first time, all they did was restoring my iPhone, although I highly pointed out that I had tried that and it didnt help. So I get my iPhone to the service again (quite crossed, though) and now I m expecting them to give me a new iPhone - trouble-free, with the old software version which I ll not update until those "smart" people at Apple solve this issue. If the problems continues, I m getting my money back...

I have had my iPhone 4S for a month now and I couldnt make one call, nor could I use 3G net. Well done, Apple!!!.

I am in Saudi Arabia, me and some of my friends got our iphone 4s from Apple store in usa, the strange thing is the white iphones don't have a problem but the network problem shows in some of the black iphones with model number MC918LL. I contacted apple support and they kept telling me that the restore as new phone should solve the problem.....well bunch of bull s..t. They better admit the problem and fix it or the hill with apple and their junk and HELLO SAMSUNG GALAXY.

Hi, I am from Mexico and I had the same problem, tryed to restore, etc, nothing works, I called apple, said to them what happend and change my phone in a week, they send me a MC923LL model, with 5.0(9A334) version.

I'll keep that version until 5.1 release, i don't want to take any risks with an upgrade. My next step if the replacement wouldn't works was change to SAMSUNG.

Exactely! Well, in case they gonna give me a new iPhone when I got it back from the servise, I m gonna stick to the old version just like you. If I had known that updateting to the last version basically kills the phone, I would have never done it!

And just like @isowayan said, restoring the phone does NOT help at all!