Generally, accounts have an expiration date. If you haven't paid the fee for a long time, such as 3 months or 1 year (the regulations vary from place to place), you will automatically give up. Not if you pay the fee.

Because of the differences in different places, and it was called Netcom in 2007, you'd better call 100 10 to consult the local Unicom customer service. Report your ID card when you apply for broadband and so on, and you may know if you can pay the fee.

Now the accounts are all a string of numbers, and there is no such @.