iPhone 4S dropping network and data at random

Ok i'm in French West indies Caribbean island and my Carrier is Orange, i've tried a brand new sim yesterday not microsim, they cutted it for me, not successfull, today i asked a guy at the shop to borrow me his microsim from orange, those micro sim they sell in contracts, i tested it for about 15 minutes in my 4S 5.0.1 it worked flawlessly no error on sms nor 3G or calls, unfortunelly they didn't had anymore Orange factory microsim today, they ordered for me from another shop in 48h i'll be sure about it, they'll change the old brand new not working sim with the microsim for free, i'm waiting but i've faith because i saw it working with no problems, even with the bug when you pull out the sim from the phone the carrier is still working with signal, with the microsim, this bug is not happening anymore you see immediatly the message NO SIM....i didn't try to reboot the phone but that's a good beginning....

Hi I am from Bangladesh.. i am having the same problem after i updated to ios 5.0.1.. Cant send any txt and call... its pisssing me off.. cant even contact apple properly.. they have all the wierd rules..

Same issue here, it makes the phone unusable, will call the service center (I have 3 phones with the same issue)

it was fine with the 4

having same issue in US. Waaaay worse signal than I had before.

Me too in Sri Lanka

I think I have cracked it. I have read every post and comments and tried and every possible fix. Does not work. I'm using iPhone 4S 16gig bought from Melbourne, use in Cambodia carrier Mobitel.

Issue, no signal. 3G come and go. I have to on and off to get back signal sometime aeroplane mode on and off. My iPhone is useless. It was fine on 5.0 problem only exist after I update to 5.0.1.

I tried my GF sim card and everything works fine, signal is full. I switch back to old sim problem come back. Today I went to the carrier and get me a new sim (does not matter 32k or 128k, they only have 32k btw, same sim I used before) And now, its fine. Its been 3 hours now. Normal I have no signal every 15-20 min I have restart and attempt to call someone to get back signal. I think when 5.0.1 was installed, something in the OS messed up the sim card. However that sim card still works fine on iPhone 4/3GS and other phone.

I know some people have tried this and still have that issue. I know your frustration. If issue still persist, keep trying different sim cards. You will see the different. I hope it works for you. Now for me I am inclined to not update software without prior research on forums.

iPhone 4S from Phnom Penh, Cambodia.

Well I have (had the exact same issue)

I called apple and logged a call.

the responce I got was frustraiting but some what helpfull.

I had an Iphone 4 before my 4s. Apple technical support says that the microsim from the apple 4 isn't compatible with the 4s, they told me that all the providers in europe were told about this before the lunch and they should give out new sims.

Now I explained that I was in Kazakhstan for the moment and wanted to know the differances so I could tell the local providers. They did not have this info but they told me to try with a card that had not been used on any other phone.

I did this 30 min ago, so far it does work ( the line use to drop every 5-10 min )

Will post agin if this does not work

Still in Lebanon...still wiz z same problem...micro sim changed...reastored network default...restored iPhone...

No Way, I'm always having network for few seconds and then NO SERVICE....

I really hope Apple is working on it bcs I can not pay €900 for a iPhone sim free and it doesn't work at all

I'm very disappointed and MAD!!!!

@hejo82

To all swedish readers using Tele2 carrier

Ja har precis varit i kontakt med Iphone supporten på tele2 igen och fick pratat med en vettig tekniker.

han bad mig skicka länken till honom om detta forum. jag skickade länken till denna tråden och han fann det väldigt intressant. Han ska prata med andra tekniker om det går att lösa ett 64k sim som jag ska få prova som försökskanin, de har fått mitt nr så de kan nå mig direkt i detta ärende. de skulle återkomma under dagen.

Jag kommer med nytt inlägg så fort jag vet något nytt om ärendet.

Hej Nesse10,

I am also using Tele2 sverige with my new Iphone 4s and I also got the problem. I sent this link too to the support of Tele2 sverige through their mailing support service. I hope I will get an answer asap because right now the phone is pretty much useless.

I am also wondering if the battery life problem is not connected to the fact that the phone tries a lot to keep in touch with the network, issuing a lot of requests, which probably use a lot of battery....

Lameth

i think the problem is :

Cant turn off the 3G

Why? Because i already tested in one location "with low signla" 1 bar for 3G.. After that my bar signal is gone and my iphone is searching for signal.

#Spot signal is the reason why we have this problem :))

Try to buy new sim with good networking ^^,

same trouble here : after updating to ios 5.0.1 on an iphone 4S im getting trouble with network searching all the time and if it get some bar there is no 3G at all

i tried : disabling the PIN / reset the software / reset the setting / restart ...................... no solution

any help please

have an idea how to return back to IOS 5.0 ???

Me and my friend Sven ordered iPhone 4S at the same time. And we both have Tele2. We both have 5.0.1. His phone is working fine, not mine.

So, I tested the 4 possible combinations:

• Svens SIM in Svens iPhone: Works fine.

• Svens SIM in my iPhone: Works fine.

• My SIM in Svens iPhone: Works fine.

• My SIM in my iPhone: Does not work.

A few differences:

1. I ordered a new SIM from Tele2 because I did not have a Micro-SIM, and Sven cut his old SIM to fit.

2. I updated to 5.0.1 from 5.0 with iTunes sync, Sven used the new built in update feature.

3. I am a developer and used the iOS 5 beta for a while on my old 3GS, before iOS 5 was released, Sven never installed the beta. Though I doubt this has to do with it.

I just got my replacement iphone from Apple 30 min ago

Installed it as a new phone, not back up from my previous and it works fine

I do not dare to update to 5,0,1

Later I will restore data from my previous phone wen I get back home from the office

I´ll keep my fingers crossed

PS

I´m using the 32k sim from Tele2 in Sweden

any idea how to go back to 5.0 ???