This Droid2 will power down in the middle of a call (even with plenty of battery life). Has happened more than once and it takes forever to power it back on (hold down the power button for >30 seconds). Phone will also just lock up when just sitting idle and cannot get it to respond (little green light flashing in the corner but the power button will not work)- I have to remove the battery and reinsert to get it to get it power up and give me a login screen prompt. Anyone else experienced this? Is there are fix or is this a bad phone? Any diagnostics I could run on it?