iPhone 4S dropping network and data at random

I've gone to great length and put lots of hours into this matter trying to figure out what's causing this problem. And as you can see in my earlier posts I've tried everything and have had extensive contact with my operator (Tele2) in this matter.

I finally caved in and returned my iPhone 4S to Tele2 and they sent it to Apple which in return sent me a new phone a week later with iOS 5.0 installed. And TADAAHH!, Everything worx like a charm.

Note, I have the same exakt microSIM, a new phone with supposedly same hardware but iOS 5.0 instead of 5.01 and making and receiving calls and messages now works like a charm.

This is my tip, return phone and get a new one with iOS 5.0 on. This saves you a lot of time and headache.

Conclusion It's not the choice of operator and not the microSIM that's causing this problems. It's either the hardware in the first iPhone 4S that was sent out to customers (like mine), the software, or a combination there of.

I know people here who didn't upgrade, still have the same problem on Iphone 4s and Tele2.

I'm having the same problem. The weird thing is that with a Spanish Movistar sim card the phone works perfectly, but with a Swedish Tele2 new card I just have a very expensive ipod touch... I had problems with 5.0 and they got really worse after updating to 5.01. There are considerable differences between the two cards (the blue one is movistar):

I have the same problems and have tried all suggestion!

iPhone 4S, 16GB, IOS 5.0.1

Location: Brazil

Provider: TIM

My phone is useless!!

New USIM microsim making the phone work. Note, I have a phone that also had problems prior 5.0.1. mostly related to battery. And with 5.0.1. the phone was completely useless.

Been using the phone lightly now for 9 hours and battery is at 73% so it looks quite good.

Hi, could you specify the upper or the lower as to my vision both of them are rather blue. Mine is simillar to the upper sim (Telcel, Mexico) and it's not working properly in my iP4S16GB.

Hi Benpalmason, Im also having 3G data connection. did you switch from 64k to 128k to just swapped to a new uSIM?

The upper one (dark blue) is a Spanish Movistar simcard, the lower one (light blue) is a Swedish Tele2 simcard

Hi Kosiak I have the same problem as you had. dropping tele2 connection. I bought unlocked phone in Ireland. I want to ask you what number you called to Ideal,? i'am, from Lithuania and want to replace the phone.

Thanks

Hi Johan, to be honest, I don't know what type of old Sim I had. Just that it was a standard Sim that has been cut (microsim). Tele2 should be able to implement USIM's? I guess they could just disable some features of it to make it compatible...

This bug is definitley related to the SIM. Another user on this thread told tha Apple had told the carriers about this "feature" beforehand.

@Carraspín: the bottom card is the new USIM-type of cards (more advanced)

As an update: I had a regular 128k SIM that was cut to a uSIM. Everything was working except 3G data connection. My carrier did not have 128k uSIM at the moment so I received new 64k uSIM instead. HOwever, The problem remains. Now, also with dropped calls at random!!! How can you sell a 700$ premium phone wihch not yet can fulfill the basic funtionalities? I should have remained as a loyal Android user....

So we must wait for iOS update, change cut simcard or go send phone to service?

I am from Poland, T-Mobile and I don't believe that.... Today I receive new phone and I can't make a call to anybody!!!

I'am from Poland too 🙂

i have a wery weak 3G signal in my area so sometimes calls are dissconected

we need a 3G switch!!!!!

I am from Czech rep, and i have exactly the same problem, the worst of all is, that apple said, the new 5.2 should be until the end of this week...and nothing happend, so it can take weeks waiting for new 5.2...!:/

I had the same as all of you with IOS 5 and IOS 5.01. After three days being ****** I contacted Apple and they send me a new iphone 4s. And the new one is just working great!