If you delete a call log from iphone, can you still find the record of calls and facetimes from your service provider (tmobile)?

Facetime is something for only apple devices, but would your service provider still have your facetime calls in their logs? And what about regular phone calls? If so, is there a way to request they are deleted?

Your service provider will have a log of the times of your conventionally made calls. They will not though have a specific record of your facetime calls as, these will just appear as data usage!

Regular calls, yes
FaceTime calls, no