WHich Iphone to buy in USA that Can work with Telcel?

Any unlocked iPhone will work. Make sure you buy it directly from Apple. All iPhones purchased from Apple are unlocked. Other resellers such as Target, Walmart or Best Buy will sell you locked phones to a U.S carrier.

Hi CerbTheDog,

Thank you for using Apple Support Communities. We understand you are looking to purchase an iPhone in the United States that will work with Telcel and we'd like to point you in the right direction for help.

If you have reached out to Telcel and they are unable to confirm the iPhones that work with their service, please reach out to our Sales team here: Contact - How to Contact Us - Apple

We hope this helps.

Cheers!