The only way prepay would matter is if the phone is one of those with 4 buttons, that can be programmed as numbers, and you can't call anything else. Otherwise, being prepaid or not doesn't make any difference. If you can call your grandpa, ask him to call the clinic. You also said your mom didn't have a steady job again, in that other thread, and that's why you needed help. She can't be gone from 7 a.m. to 10 p.m. every sngle day or youd have plenty of money. I'm sure there is SOME time in there you can call.