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I am facing a really strange problem in iPhone 4 CDMA. Inspite of various efforts by me & Gaurav, we are unable to understand the source of this problem. Request Gurus to please enlighten. Details are given below:- On getting the phone from Gaurav I asked web world to transfer my number and after dialling *228 it started working for calls & sms. However, after 2 days i noticed that its not making or receiving calls. On dialing any number it instantly says disconnected and incoming callers hear "phone is switched off" message. It starts working after 4-5 hours or a day. Then it stops again after 2-3 days. Signal bar is full and its NOT an AKEY issue as even after entering the correct akey it doesn't start working. And even if i don't enter akey it will start working on its own after some time. Gaurav even changed the ROM to stock ROM (from earlier Chinese ROM) as suggested by Genius but the problem reappeared after 2 days. Its on iOS Version: 4.2.8 (8E401). Phone shows the following: PRL: 212 ERI: 5 MDN: 000 000 4660 Gaurav knows about the baseband etc issues and has ensured that baseband is not upgraded changing the ROM. Since it works sometimes, so we think it shouldn't be a MIN, PRL or Network related issue other wise it wouldn't work at all. It doesn't seem to be a hardware problem as phone's new & hw issue would probably be permanent or at least degrading quickly to a permanent problem. Couldn't find any one with similar problem on the internet even (except this 1 topic - but it doesn't have much details) Which leaves us with no other suspect for this problem. I am at my wits end waith this thing. Any advice resulting in fixing this will have a Sixpack of Kingfisher (or your favourite brand) being delivered to your doorstep. If you need to know any other technical details then either me or Gaurav will post it here. I think I have included everything.