MIUI 1.11.25 - Phone reboots every time I make or receive a call - works on stock ROM - any ideas?

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http://androidforums.com – Using MIUI 1.11.25 and love this ROM although I'm now having a strange problem. Had to go back to Stock ROM temporarily to activate my phone when I switched phone numbers. After that I restored Nandroid backup of MIUI 1.11.25 I had been using that was working fine a few days ago (could make and receive calls with no problems). Now whenever I make a phone call or receive a phone call, the phone reboots after 2-3 seconds of the phone call. Very frustrating and would appreciate any help? I flashed MIUI 2.4.20 to test that and had the same thing. Went back to the stock ROM and the calls w (General)