MTS Telekom Srbija Prepaid SIM card Serbia New, unopened Serbian SIM card You will get SIM card with new number and instructions. Never used so you have to activate it by instructions from the company that provides service. Activation is possible only in Serbia then you can use it worldwide. If you need activation I can do it for you but you must inform me before shipping. You will get credit for activation but for phone calls and Data for internet depends of the current promotions of the company that provides service. Those promotions are for domestic calls and data not for roaming service. I do not guarantee how much credit and data you will get with promotions because they change promotions monthly. You can always charge your SIM card online using your credit card or if needed, I can get you charging credit in digital format. Roaming works by default after SIM card is being activated but for roaming use you will need charging credit. Message me for charging credit details. NOTE : you have to disable mobile data when using this card if you are not in Serbia because it will eat all your credit! Activation of SIM card To activate your SIM prepaid card you must be in Serbia and use MTS app or use code *100# SIM card is valid for 12 months after activation. Credit is valid for 90 days after charging and is not automatically renewed. Use MTS app for Android or Iphone to control your SIM card