Check your phone’s Settings app
Look under About Phone or About Device
Open SIM card settings or Mobile Network settings
Dial your carrier’s customer service number
Call or text another phone and check the displayed number
Check your SIM card packaging or carrier documents
Log in to your mobile carrier account or app
Check contacts for your own number if saved
Use a USSD code from your carrier if available
Ask a friend or family member to read the number from their caller ID