Block a lost phone with your carrier

A carrier can discuss suspending your line, SIM and possibly device service after a loss. Their options and evidence requirements vary.

What to do

First, check

Locate the carrier's official support number or account portal.

Then

Ask what they can suspend now, what happens to two-factor SMS, and how to restore service on a replacement phone.

If it’s not that simple

SIM/line suspension

Ask how it affects calls, mobile data and verification texts.

Device-service restriction

Ask about the carrier’s device options and required evidence.

Replacement access

Plan how to regain your number without relying on a code sent to the missing SIM.

Report a stolen phone and its IMEI

Good to know

Carrier suspension protects service; it does not retrieve the handset or erase its contents.

Official source