How Can I Unlock A Sony Ericsson T637

I've had this phone for a while and i just found i had it in storage and i have it locked 2 ATT and i'm wondering if u can unlock it without the data cable and if i do need the data cable wats the software i need. because my bro tried to unlock it burhe blocked my att sims card so if n e can help me just email me at:

[email protected]

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find Terminator Dongle
make sure your computer has printer port

the only wasy to unlock it without data cable is to use provider code