Since the software update, I can't load internet half or more of the time, and by the time I do, my battery is dead; sluggish keyboard entry, sometimes I can't even make a phone call, phone shuts down by itself.  I thought the Thunderbolt was bad before; now it's worse.  I do have an extended life battery, because the original one wouldn't even last one day (even without surfing, games, etc.).  I will try putting my old battery back in, but it wasn't very good before either.  I have asked Verizon for a credit on my bill because my phone is pretty much useless most of the time now.  When I complained at a Verizon corporate store, they told me it was because I got the phone at Best Buy that I was getting an inferior product.  Didn't Verizon sell the phone originally??  Not sure what kind of argument that is.  I hate this phone.