Not anyone can track your phone
only your sim company can do it . But another fraud can be a little diferrent > Here in Romania someone calls a person and he tell him that he won 1000$ then he must get a recharghe coupon from his network ( 10 $ on that coupon) and send him the coupon number ( with that number you can recharghe your sim account ) . A lot of persons have been pushed in this situation and a lot of them sent the coupon number to the attacker. Then the attacker after he got about 2000$ from victims he sold that sim credit on the internet . Of course he has been charged of fraud by the police :P