what is the expected end of life for the Samsung Exhibit 4G? I bought mine off ebay for $285 in Oct. of 2011 and lately (Feb. 2013) it is (unrooted-factory settings with apps) rebooting randomly, battery draining and dying almost daily. Everything is turned off (wifi, data 4G, bluetooth, internet, it is a text-only data plan as I can't hear on phones). I'm wondering if it is at the end of it's life? I would be vastly disappointed it if were. Any other Exhibit 4G owners out there?