Yettel 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. 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. I do not guarantee how much credit and data you will get with promotions because they change promotions monthly. Roaming works by default after SIM card is being activated but for roaming use you will need charging credit. NOTE : you have to disable mobile data when using this card if you are not in Serbia because it will eat all your credit! Use Yettel app or use code *111# and choose options for bonuses abd details for your SIM card. SIM card is valid for 12 months after activation. Credit is valid for 90 days and is not automatically renewed.