You can activate a new or used iPhone for use with a cellular service provider in a few steps. Here's how to activate any ...

Activate your iPhone back to AT&T if the SIM card you insert after you install blackra1n onto the device doesn't work properly. Blackra1n is a third-party program that "jailbreaks" SIM-bearing iPhones ...

We previously reported that a tiny handful of iPhones shipped without SIM cards, while significantly more units have generated the error message "No SIM card ...

If you went the prepaid route and ordered T-Mobile's no-contract iPhone 6, you may have no idea what to do once it arrives. Rick Broida is the author of numerous books and thousands of reviews, ...

Those little chip-size SIM cards that plug into our smartphones are on their way out. Apple says so, and there’s a good chance Apple is right. This week, Apple said its new iPhone 14 devices will no ...