According to what I know, as long as the poster’s credit card limit is higher than the price of the goods the poster wants to consume, it can be used. However, according to general experience, the cheapest Apple mobile phone is 6,00. Therefore, the credit card limit of the poster should not be enough to buy a new mobile phone. It is recommended that the poster can apply to the bank for an increase after half a year of use, but during the use period, he must ensure a good consumption record and repayment record. The above is the information I learned. I hope my answer can help the original poster!