im using iphone 4 and never jailbreak and having the same issues like you guys, no service or searching signal. i will try using manual rather than automatic search.
i believe is an iOS 5 bug. i have updated to iOS 5.0.1 and the problem is worse.

thanks to pipedream and other users comments and suggestions to temporarily fixing the network signal issues dropping after updating to iOS 5.0.1
i search through the apple forums and lots and lots of ppl complaining about battery issues and the cellular network signal dropping faults. i really hope that apple will look into this seriously as is making users more annoyed and miserable.
Anyhow, i will try to restore back to iOS 5 first as the problem is getting worse with iOS 5.0.1 while waiting for apple to released the new firmware.

Oh, i will give it a try and see..thanks for the info.

Me too...i shud have stick to iOS 5, is way better than iOS 5.0.1!!

I have done fresh restore to ios 5.0.1 and will test this week to see how the signal issues. If is working fine will let u all know. Tried restore iOS5, unable to do so only can restore to 5.0.1

hi all, as I see that everyone has the issues of whereby the network cellular dropping to NO service or searching issues and my iphone 4 had the exact same problem. I have tried several options like restart the phone or reset the network settings, all of the steps does not work.

I have found one temporarily solution is that if really all the above mentioned steps does not work, try this method as below. Before doing the below steps, PLEASE MAKE SURE SYNC UR IPHONE to ITUNES 1st to backup before doing the below steps as I'm not held responsible for any data/apps/contact or etc missing after doing the below steps. After then you finish resetting it to default, your main screen wallpaper is back to apple default wallpaper and is like setup a new phone again and the nice things is that ALL your apps,contact,songs will still be intact.
Try it and it works for me as temporarily solution while waiting for Apple to release new firmware.


Go to Settings->General->Reset->Reset All Settings

P/S: Make sure select RESET ALL SETTINGS

AND NOT ERASE ALL CONTENT AND SETTINGS

This post has been edited by lck: Nov 24 2011, 04:33 PM