Will completely resetting my iPhone delete my number and provider?

Will completely resetting my iPhone delete my number and provider?

No. The number and service provider are assigned by the SIM card, not the handset itself. If you want to change number/provider you need to get an alternate account with a new provider, and they will give you a new SIM card liking your phone to that account.

No, it would wipe everything off the phone. But your phone number IMEI and carrier plan is still saved.

If you want a fresh start for your iPhone, you might be interested in learning how to erase your iPhone 5/5s/5c/4s or other iDevices. Erasing your iPhone will delete absolutely everything on the phone, from contacts, to applications, to music, or any other saved files. There's no easy way to recover this data, so be absolutely sure you are ready before you erase your iPhone. Before you continue, save any files or contact information you wish to keep to an alternate data source.