I just received a gift from my cousin of a DoCoMo NEC N-05e unlocked handset, and upon arrival, I found that every SMS message I send out returns an error code of "-1" and the recipient won't receive my text messages unless I resend it at least 3 times, at which point they receive 3 or 4 of them at once. I was wondering if anybody knew anything about this or how to fix it?