I just put a new 02 sim card in my Galaxy Ace GT-s5830i and my phone won't switch on properly, how can I fix this?

[AC Question]

just put a new 02 sim card in my galaxy ace GT-s5830i and phone wont switch on properly

old phone stopped using a yr ago ,ordered sim off 02 site .

 

[B. Diddy]

Re: just put a new 02 sim card in my galaxy ace GT-s5830i and phone wont switch on properly

Welcome to Android Central! Does it freeze on the boot screen? Is the battery fully charged?