Hi Bunnyhon, apparently this update (5.0.1 9A406) is supposed to resolve the problem.🙂
Spielothek (previous posts) who was having the same problems as most of us was able to update to the same operating system that you currently have 5.0.1 (9A405).
This then apparently allowed him to update to 5.0.1 (9A406) by connecting to Itunes and updating (window opens telling you there is an update available) and appears to have solved his problems.
You have nothing to lose so you might as well go for it.😉
My phone seems to have more issues, I can not update to this latest tweak as the file in the firmware on my phone (get this) is apparently not compatable with the update, amazing!!! The last attempt to rectify the situation handled by a Senior Supervisor last night failed. I have spent about 4 hours total time talking to Apple support, no one admitting there is a problem, treating it like it is an isolated situation, what a joke!!!!😠
It may well be that going to 9A405 would sort out the firmware on my phone but they say they don't know about 9A405. Another joke!!! Anyway I can't do it at present because I don't have a wireless connection.😢
Anyway I am to contact them to let them know what happened and as it failed it looks like the phone needs to go to an authorized Apple repair place. They will arrange an appointment or postage for me. I will do that later today.😟
Incidentally, the phone works fine with my China mobile simm card but not with my wifes. Same with my friends simm card, works perfectly. By the way those 2 that work are identical and mostly white with the circuitry in the centre, my wifes simm is mainly blue in colour and has the circuitry offset to one side and this is the one which does not work in our phone. However, this simm card works in my friends phone, so how does that happen?😕
Try the update. If you still have the problem after your return get on to Apple Support 4006 272273 (China) and moan, if enough do it it will be sorted sooner. (p.s. Get them to ring you back so they pay for the call😉).
By the way that difference in the simm cards was mentioned previously and someone suggested trying different shops to see if any had the white ones with the centred circuitry, but my God where does it end, traipsing all over China looking for a particular simm card, Crazy!!!😀