I just paid for a Sony Ericsson s710a on eBay and was wondering whether I even need to unlock this thing. I was intending to switch my sim card from my Samsung x426 (I go through Rogers) into the Sony. I understand that the SEs710a is a GSM phone, but am unsure of whether it's automatically compatible with the Rogers network or if I have to unlock it first. Does anyone have any answers? Thanks in advance.