my friend has similar problem, he solved it by getting a new micro simcard from telco.. perhaps u guys can try... since i seldom check lyn, pls pm me if u try this method and it works.. thx

just upgraded my iphone 3gs to ios 5.0.1 . i got ' no service ' issue n what to do?? i tried to reset everything but nothing seems to work. so sad ! the network always keep on searching .. how could this happen? :'( n now i off my iphone n when i want to turn it on, it stuck on the apple logo/loading icon.. :'(

This post has been edited by samm17: Feb 2 2012, 02:49 AM

same here,

somehow it doesnt detect my carrier (celcom). iccid = no sim.

before upgrade, i was using ios 4.3.5. now updated ios 5.0.1 as suggested by itunes.

tried downgrade but itunes came out with error. is it im using 06.15 baseband? bcoz i was using it from ios 4.3.5.

Im facing the same thing like you guys rite now....
I dunno why but mine not jb yet and its running ios 5 and just bought couplee days....haiz this is so frustrating man..

very frustrating.. especially when we spent over RM 1 / 2 k for iphone. at this moment I sent my iphone for repair,hope to hear good news about it.

managed to use solved it by making custom firmware using sn0wbreeze. then using expert option, enable [/] ipad baseband, enter dfu mode. restore using itunes. after reboot, go to cydia, install ultrasn0w. reboot again. then celcom signal founded by iphone. done.

jb?

i guess so. had to do it. else, stuck at activation. btw, the apple guy did jb it for me at 1st place (version 4.3+). so i guess no prob.

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Added on February 5, 2012, 10:59 pmi guess so. had to do it. else, stuck at activation. btw, the apple guy did jb it for me at 1st place (version 4.3+). so i guess no prob.

This post has been edited by cjoenic: Feb 5 2012, 10:59 PM

hmm..perhaps you all can try to jailbreak using SNOWBREEZE.. the signal problem won't exist anymore..
i did try for few months and it works fine.. =)
http://ih8sn0w.com/

for those stuck at 5.01, solved mine using sn0wbreeze. you need to reflash the iphone baseband to ipad baseband 6.15. even if you already have. then install 'jb' version of 5.01.

i guess its not going anywhere without 'jb' .

fixed my 4s with 5.1b3
2 weeks uptime without "no sim/sim failure/no service" issues

I just suffered this issue on my iPhone 4. Can I send my iphone to warranty without a Maxis warranty card ?

IOs bugs~ Try to turn airplane mode and mobile data on and off~
Hope it works
If not, just reset the settings for ur iphone
Hope it helps, it happened to most iphone

anyone have tried updated to ios 5.1 and is it solve the problems?