A sim free phone allows the user to freely choose what network they want to sign up to and choose what service plan they can afford. Another advantage is that you are not locked into a contract and being locked into a particular network .
Sim mobile phones include several advantages as allow the consumer more flexibility. These phones give customers the freedom to choose their service provider.
An AT&T sim card will not work in an T-Mobile phone as it is locked to particular carrier itself... If you want to put your AT&T sim in your T-Mobile phone you can try unlocking your phone
Yes you can
When i went to pakistan i used a different sim card called Lebara mobile
You can't get a T Mobile service on a phone that's not T Mobile unless you get it unlocked. Once the phone is unlocked, you can use your T Mobile SIM card on it or any other GSM SIM cards worldwide.
Provided that the Android phone is a GSM-capable phone, and has some of the same bands that T-Mobile uses, then it is possible to use a T-Mobile sim card on it.
how to tressing a phone by it's sim card number in online
If the prepaid SIM is also from T-Mobile, then yes.
Well, yeah. No one can stop you from buying it when you don't have a phone. That is, unless you are buying it directly from the carriers.
Yes, An "Unlocked" Phone means you can put ANY operator ("Orange", "Vodafone" etc) SIM card in it.
Yes
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.
Type your answer here... Yes it is dual SIM mobile phone...