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Yes - unlocking the handset removes it's 'loyalty' to a specific network. You simply change the original T-Mobile SIM card for the Metro one.
Only if the T-Mobile phone is unlocked. If the T-Mobile phone is still locked, only T-Mobile SIMs will work.
I'm pretty sure you can as long as your phone is unlocked then yes! I hope I could help :)
You can buy a jailbroken unlocked phone from eBay and the metro pcs people will hook it up :):):):):):)
yes, if its unlocked. you can put an att or t mobile sim card in the sci phone and either will work. i think those two work unlocked or not
If the net 10 phone is "unlocked" and the sim card fits. Usually the phone needs to be unlocked network wise not pin wise.
No - the phone is the item unlocked - not the SIM card. If you were to replace the Optus SIM card with (for example) a T-mobile SIM - it would register to T-mobile. You could swap the SIM card back with the Optus card, and still use it.
Yes if the phone is unlocked and you get an AT&T sim.
YES, you can. IF you have an unlocked code for your at&t phone with T-mobile service. If you don't have an unlocked code, go to your local at&t store and they will unlock it for you, And, you won't lose any information with your T-mobile plan when you put your T-mobile Sim card on your at&t phone.
Hi, yes a at&t Sim card will work on any unlocked phone
no
Only if the phone is not locked to t-mobile.