ALL,
Because of the wide range of problems I see here (most recently by JoeNe and Gary) it made me wonder if BAD batteries might be the cause because so many have different problems yet so many others are okay.
First let's do this to level the playing field for these testa. It will not reset you phone. If you are afraid to do this forget this step. Removed the battery, the Micro SD card, and the SIM card for 60+ seconds and then put them back in. NOTE: before you start this process go to Settings>SD card & phone storage and click on Unmount SD card. Then turn off your phone by holding the upper right side button for 10 seconds or until it turns off. Remove the battery first and then the SD card and then the SIM card. Be gentle with the SIM card and keep track of which direction goes in first and which side is up.
Wait 60+ seconds, insert the SD card and the SIM card and finally the battery. Turn on the phone and go to Settings>SD card & phone storage and click on ReMount the SD card. You are set to go.
Forget the little blue battery that show charging in the upper right corner of you home page screen. To see your battery's charge level use the percent of charge instead. In case anyone does not know here is where it is...from th Home page go to Settings>About Phone>Status and the second item down is Battery Level in percent and above that the Battery Status shows if it is charging or not.
A weak or failing battery can appear to charge up fully but in reality only it's voltage level is okay so the phone appears to operate okay. What occurs is the amp hours, which are really the power in your battery, may also look good but in a weak or failing battery instead of lasting for hours the mini-amp hours (mAh's) of your battery may go down within a few minutes or an hour or a little heavy use by you. For example, using the camera's flash could bring it down after one or two photos. I'm sure some of you know that when your car battery is questionable they use a load tester which puts a electrical load on the battery for a few minutes and they measure how much that depleted the battery.
Test #1 is to the have a FULLY charged battery It's important that it's fully charged so go take a look at its percentage of charge. Next, have the phone plugged into the 115 volt electrical current, NOT the USB port because the USB port does not charge with as mich power as does the 115 volt charging. Now use you phone that way for a while to see if any of your problems go away because you now have the highest and best power available. Best of Luck!
Test #2 is to see if your battery loses it's mAh power to quickly. In other words does it discharge to quickly. Again start with a fully charged battery and the phone should NOT be plugged in for charging. Go look at its percent of charge and write it down. I hope it's 99% or more. Then set your camera up and take EXACTLY 10 flash pictures, no more no less. Set the flash to ON so it flashes every time. I chose flash picture because they appear to use lot's of battery power. After the pictures check the percentage of charge again. Did it go down below 50% or further? That may be a sign of a failing battery. It is to bad we do not have any statistics regarding how far down it might go but do tell us your results for your test so we can compare. We want the batteries % to start with and it's % at the end of the test.
For now tell use your results.
JerryF