Q: iPhone 4S loses signal

Having exactly the same issue with my brand new iPhone 4S, which effectively makes it unusable

Signal is perfectly strong all the time and rebooting helps every time (so exactly the same issue I think)

Location: Amsterdam, Netherlands

Network provider: Vodafone

iPhone 4S without Bumper

Exactly the same for me aswell.

Location: Sweden

Provider: Telenor

Update: removing the SIM-code fixes the problem.

Or better said: it's a work-around

Now trying to find out if this is a iPhone or a Provider related issue

This is a link to a (Dutch language) forum of people all having the same issue:

http://forum.iculture.nl/f28/iphone/f32/iphone-algemeen/103507-iphone-4s-problee m-vodafone-sim.html

Same problem here. Lose signal every ~10 min, then get it again(some times not) rebooting helps, but i need to do it too often.

New iphone 4s 64gb.

same problem since ios 5.0.1 update

location istanbul/Turkey

carrier Turkcell

I'm having the same problem with you since I upgrade my iphone4s to iOS 5.01.

Country:Indonesia

Provider:Indosat

Go to settings>Reset network settings. If that doesnt help, contact your carrier to see if theres any tower issues.

Same with me. Upgraded from 4 to 4S few days ago. Connection is obviously worse. I'm now in a 4.6 mln city with dense mobile network and usually good connection.

Usually it happens as follows: the phone suddenly switches from 3G to Edge then to GPRS (a circle sign next to signal strength bars).

While the phone may still show strong signal, actually it's off the network. If I try to browse, text or call, there's no connection or network error.

Reboot always helps, but as it was already mentioned above, several times a day is too much for a gadget priced at $800+. The worst thing is that I never know if it's on or off the network unless somebody pops into my room or calls me on another line shouting why my phone is switched off.

Any help is highly appreciated. Thanks!

Location: St. Petersburg, Russia

Provider: MegaFon (North-West)

I'll check with different providers (SIM cards) in other countries next week. However, it seems the problem is not provider specific

%101 same problem!

Location : Bulgaria / Sofia

Carrier : Globul

Same problem here - Location: Bucharest/ Romania - carrier Vodafone

Brand new microSim...

Also not recconecting to 3g (although it displays the icon) after setting mobile data to off and then again to on.

... please fix this Apple

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 40 min ago, so far it does work ( the line use to drop every 5-10 min )

Will post agin if this does not work

Same problem here - Location: Shanghai  /   China-  carrier China Molie

Brand new microSim...had changede many times

If that is true (that you need a brand new SIM, never used for any other phone), then I'll return the phone to Apple.

And I believe that many people will do so. I travel a lot and have a bag with dozens of SIM-cards that I use interchangebly with my iphone, normal phone and ipad depending on the country and roaming fees.

So let's hope it's just a technical glitch that will be fixed by a software update.

I think that piece of info that you just mentioned here (if true) would be picked by media with interest, especially now when competition with android devices gets tougher

i have the same problem here in greece !!! apple have to do something !!!! i pay 650 euros for a phone and i can not even make calls !!!!