Yes, you can. This matter will be dealt with in stages. After applying for a refund successfully, the merchant will send the information to China Merchants Bank, and the bank credit card center will handle it manually on weekdays. There will be no handling fee.

If the installment cancellation is near the bill date, which leads to the installment payment of the current bill, you need to call the bank customer service and report to the customer service manually, and they will do the follow-up treatment.

There are two kinds of mobile phone signals that can be returned: one is that the weak signal in your place will lead to the decline of call quality; Second, it is the problem of mobile phones.

You can take your mobile phone to a place with good signal to make a call. If the signal is ok, it will be troublesome to return it. If you still can't change places, you can complain, call the industrial and commercial bureau, and the industrial and commercial bureau will help you adjust. Maybe it's to lower the price or something.