NO!! Don't upgrade. My voice to text on Jelly Bean only works at home with a 5 bar signal & wifi. It has worked in a Tmobile store, nowhere else, even with strong signal. If I wait long enough for the voice prompt (usually 1 min+), get message "can't connect to google". Also, sucks down battery life by a good 30%. I'm having T-Mobile send me a warranty replacement because I can't go back to Ice cream Sandwich (4.0), even if I do a factory reboot. I'm not familiar with forums (1st time), but I make the effort because this new upgrade shows how incompetent HTC is (not sure if T-mobile shares blame here).