if you buy with a credit card that has no limit, you can't pay by installment, because there is no money in it, and you can't give the first money for installment. If you don't have a credit card, but you don't use this card to buy your mobile phone in installments, you can buy your mobile phone in installments. Supplementary knowledge: Credit card installment refers to the process that when the cardholder uses the credit card to make a large amount of consumption, the bank pays the consumer funds of the goods (or services) purchased by the cardholder to the merchant in one lump sum, and then the cardholder repays the money to the bank in installments and pays the handling fee. According to the cardholder's application, the bank will deduct the consumption funds and handling fees by stages through the cardholder's credit card account, and the cardholder will repay them according to the monthly recorded amount.