try these guys http://www.buycheapr.com/us/result.jsp?ga=us13&q=garminfone+battery they have batteries for $10 - $15 each. I replaced my battery about a year ago. still 12 - 18 hours life but doesn't overheat any more, may be battery, updated software or 'hard' reboot. Note that hard reboot wipes out all your apps and data which wasn't completely restored although I believe I followed the directions to do so correctly. the battery # is 361-00044-00.
I'm in Los Angeles and now on my 2nd battery and my phone keeps shutting down when trying to charge it up! I even turn the phone completely off and charge overnight. It still stops charging at some point and I wake up to an almost dead battery. ALSO I have problems with phone syaing it is over data when it's not!! (I have ONE application I installed!!) CAN'T WAIT TO BREAK MY CONTRACT WITH TMOBILE!!! NEVER AGAIN!!
CAN'T WAIT TO BREAK MY CONTRACT WITH TMOBILE!!! NEVER AGAIN!!
Be careful what you wish for. This is not T-Mbile problem, this is a Garminfone problem. I have friends on other carriers and for the most part, their customer service is even more oa joke than T-Mobile. Cell phone companies aren't going to bend over backwards to help a single customer when it is more profitable to get 1000 more for the same effort.