If there is an unpaid fee, can I be denied new registration when I change my phone?

pu1. All three carriers share unpaid charges. So if there's an unpaid fee, you can't sign up

2017-12-15

OK

pu2. You can sign up if you pay all the unpaid bills

2017-12-15

OK

pu3. If there is an unpaid charge, the information will be sent to the credit company. So not only the telecommunications company but also the financial company can tell that it affects not only the telecommunications company but also financial transactions such as banks, so you have to pay attention to the unpaid bills

2017-12-15

OK