[Boobuntu]

Hi, i'm new to these forums, and i desperatly need an answer for this
my carrier is CLARO, in dominican republic, and i had a sprint rom update
since then i've been having all trouble.. i can't sms,connect,call, anything.
It ALWAYS says roaming on the top no matter what..
from what i've read, programming fails too because i get the "VIva" operator.WTf? when i dial *228 a monkey guy talks.
so whats a prl and an eri, and are these the factors involved in here?
my dad has a gsm touch, if i manage to get those 2 items, will it be solved?