If you port your number from 48 to another provider then your agreement with 48 terminates and I believe that your account will be disabled and/or deleted and cannot be retained.
17.6 If you decide to switch or port your mobile number from 48 to another service
provider, where there is a failure of the porting process we will, where we reasonably
can, reactivate your number and related services until the porting is successful. We will
also take all reasonable steps to continue to provide services to you on the same terms
and conditions until the services of the receiving provider are activated. Your agreement
with us will be terminated automatically upon conclusion of the porting process.
...
What happens when the agreements end
When this agreement ends, we will disconnect you from the Network and you will have
to pay us all outstanding Charges which are due to us. Unless Section 7.3 applies, unused
top up credit will be lost and is not recoverable when this agreement ends.
If you need to contact 48 support about this then see the links in my signature below.
