Straight Talk 2014 Version Micro SIM Card Compatible with T-Mobile or Unlocked GSM Devices This is a Straight Talk Wireless, Bring Your Own Phone Sim Card. It is Dual size, It will Pop Out as Micro or Standard size sim card. Phone you have to be used with this Sim Card must be unlocked GSM or a previous T Mobile phone to work with this sim card. Works on T Mobile Towers via the Straight Talk Wireless Service Does not come with Service pin Card..Sim Card Only..