T mobile home voip Unlimited calling ?

t mobile home voip Unlimited calling. $ 10.00 month.
Any body tryed this service. and what did u think
it seems too good to be true.
$35.00 per line one time fee,
2 year contract. brake contract 200.00 fee.
Help please tell me what u guys think.
I have AT&T unlimited 40.00 month Unlimited is it worth the switch?
How much for the setup or deposits and or do u get it back& what othere fees do they slam u with. scams HELP ???????? I have that same question.....