iPhone 4S "no service" problem

Having this problem too, once again problems with my iphone handset, this will be the last Iphone I have.

I am experiencing this problem also. I have had my iPhone 4S swapped twice and upgraded to 4A906 and I still get the No Service problem when I am at home which has good reception.

I updated my wife's iPhone 4 to 5.0.1 (9A405) over Christmas and that phone also got the NoService message. I downgraded the phone back to 4.3.3 and the NoService error has not appeared since.

Unfortunately we cant downgrade iPhone 4S to 5.0 as I believe that would fix the problem. I have also tried the latest 5.1 beta 2 build and I still experienced the same problems.

My sim in a Windows phone (HTC HD7) works great (rules out sim card) and if I use a SIM from another network provider I have no problems.

I wonder if it is a network / software problem.

hi there,

i experienced this problem on my 4s, even after the (9A406) was installed by apple.

so, i switched back to my iphone4 and had a new sim card placed and registered by at&t.

my iphone 4 now does this issue with 5.0.1 (9A405) software.

how can i downgrade my iphone 4 back to earlier software like you did for your wife?

thanks.

I already dumped my iphone 4s it gives me a lot of headaches ( missed phon=

e call due to no service as well as I missed a lot of my txt msg! so good b=

ye iphone 4s you just created a lot of puss and hype but for me your a dud!=

iOS 5.1 beta 3 was released by Apple last night for Developers which includes another baseband update. Hopefully this might resolve this annoying problem.

efab: When a new iOS is released the old version is no longer signed by Apple so you cannot simply point iTunes to the ipsw file. If you do you will get an error in iTunes that the version is no longer valid.

You need to save your SHSH blobs which are unique to the phone and iOS version using utilities like iFaith or Tiny Umbrella (|Google them). Without the SHSH files there is nothing you can do.

hello i was one of the victim of no service issue

here in germany i took it to apple store and today after almost 20 days i got a new iphone 4s with 5.0 os

every thing is working fine as of now. still upgrade to 5.0.1 is pending. have to see how my iphone works after an upgrade. hoping everything works well.

update from apple when i asked them is that there is some problem with antenna installed on iphone 4s

visweswar.c

Do not do the update to 5.0.1 (5A406) it does not fix the problem. I believe the problem was caused by the 5.0.1 baseband update (1.4.00) which has not been fixed in any public release.

I have just installed 5.1 beta 3 today which includes the latest iPhone 4S baseband update (1.5.01). I will post if the problem is resolved.

I plugged in my 4s in i tunes to update but it showed no new updates.?

How do we download the 5.1 beta 3 as you said?

To install beta releases your iPhones UDID has to be registered against an Apple Developer account (costs $99 per year). I test internal apps developed by the company I work for so my UDID is registered.

If you install a beta release and apple do not have the UDID registered your phone could become bricked by Apple until the official update is released.

That sounds a litlle complicated But what ever it is I sincerely hope and wish it resolves the ordeal we have been goin through. I'd be waiting for your response on this

Ive had this problem for almost a week now. Tried a factory reset, switching simcards, downloading a older backup, reset all network settings. Nothing works.

By the way, this is a iphone 4! Seems like the IOS 5.0.1 is the reason for this.

Check your baseband version, is it 04.11.08 (GSM). I think that is the version installed by iOS 5.0.1 update.

Check by tapping Settings > General > About > Modem Firmware

My Wife's iPhone 4 doesn't display NoService as often but it takes multiple attempts to receive phone calls. The iOS 5.1 beta 3 firmware updates the baseband to 04.12.01 which might fix this problem on the iPhone 4.

I am testing tonight on my 4S and if it works I will try the latest beta on the iPhone 4 also.

Modemfirmware: 04.11.08

I Can't revice calls or call out. Probably tried over 100 times these last 7 days.

Is it in all locations or when you in specific location e.g. home?