help please htc touch pro

[sedakai]

i believe i have the biggest failure of a touch pro to date. it started with the key board acting up, then the phone got WAYYYYYYYYYYY SLOOOWWWWW and now when i try to turn it on it just vibrates... BUT if i hold in the rest button it will boot up ad work as long as its pressed the sec i let go its gone. i cant go to sprint warranty because i dont use the phone on their network i had it added to metropcs. what should i do...will htc fix it ???? if they will is it free??? can i fix it if they cant?