(Sorry if this thread shows up twice; I tried earlier, and couldn't tell if it was actually submitted.) Phone is running KitKat release 182, and was purchased from Verizon almost exactly 2 years ago, so it's out of warranty. Problems started when I inserted a Telstra (Australia) SIM card. The phone seemed to mostly work ok, but when it booted I got a notice that the SIM was from an unrecognized source. Still, since I could place and receive voice, text and data connections, I wasn't too worried. Yesterday, when I tried to activate the phone with the power switch, nothing happened. When I rebooted, with Power + Vol Down, it went to the DUAL CORE screen and never finished booting. So I did the Power + Vol Down until the DUAL CORE screen went away again, and then hit Power + Vol UP + Vol Down to bring up the menu (Normal boot, Recovery, Fastboot, Clear Cache, Utilities, I think). Everything except the Utilities resulted in going back to the DUAL CORE screen. Furthermore, I couldn't even turn the phone off with the power button. Next, I switched the SIM card back to the original Verizon one. Same symptoms. OK, time to contact Moto. First agent I talked to recommended that I run the battery down to get the phone to turn off, then gave me the sequence to clear the cache. So I ran the battery down. Of course I had to plug in the charger to get it to the point that I could try to clear the cache. As soon as there was enough power in the battery, the phone went back to DUAL CORE screen, and could only be changed by going to the menu (the one I reported above). Next chat with Moto support, I was told to press and hold Power + Vol Down for at least 2 minutes. After doing so, I could no longer get the menu I was getting before. His next suggestion was basically to send the phone in for replacement. This is not a good prospect right now, so I'm here on the forums (where I probably should have been asking to begin with) looking for suggestions. Are there any debugging tools (e.g., ADB) that I can use to access the phone to find out what is wrong? Thanks for any help.