Unable to use cellular or mobile data on iPhone 15

nicolás210 wrote:

I'm unable to use my iPhone 15 with cellular service or mobile data, I need a quick solution

Then you should contact your cellular service provider.

nicolás210 wrote:

hola, ya lo hice y no es la tarjeta sim, si no mi iphone, gracias por responder

If your phone is carrier-locked, only the carrier to whom it is locked can release the lock and allow you to use the phone with another carrier.

If it is not carrier-locked, and your carrier was unable to resolve the problem with getting cellular service on their network, the phone may have a hardware issue.

iPhone Repair and Service - Apple Support