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 .
You can purchase a SIM card for your mobile phone in China at most convenience stores, mobile phone shops, or at the airport upon arrival.
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
You can purchase a Philippines prepaid SIM card for your mobile phone at convenience stores, mobile phone shops, or at the airport upon arrival in the Philippines.
You can purchase a SIM card for your mobile phone in Cuba at official ETECSA stores or authorized resellers.
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.
To quickly and easily get a SIM card for your mobile phone, visit a local mobile phone store or purchase one online from your service provider's website. Once you have the SIM card, follow the instructions provided to activate it and insert it into your phone.