Buy a big card when the mobile phone explodes.

First of all, you need to buy a Shenzhouxing Home Card, because it is an anonymous card, and all other actions are to record your identity. A card 50 yuan, you can use it to make phone calls and send text messages until you have a few dollars left. Then you can recharge, that is, 30/20 ingots and 20/ 13 ingots. Because the daily limit is 50 yuan, you can recharge once each.