If I'm reading this correctly, you want to use your old ID, since you just switched Internet providers?
All you really should have to do is sign in as that account and you should be good to go.
exactly. Changing providers will not impact your PS3 log in.
I've taken my PS3 to other people's homes with totally different internet providors without a problem.
access old ID after changing internet service
welcome to the forum.
The other posters are correct. Changing your service matters not. I've done it several times. Just log in again! You'll be fine