If you're a new T-Mobile customer or you recently purchased a new phone, you may have a new SIM card you'll need to activate. Here's how to set it up.

SIM locking is popular in most of the world, but the US has never caught on. Setting up SIM lock offers an essential layer of protection.

An upcoming Android update will make it easier to quickly switch the SIM used for mobile internet with a Quick Settings tile.

rSIM is the world's first "resilient SIM card". It basically has the features of two SIM cards in one, which is interesting.

But with Android 14, Google is adding the ability for Dual-SIM to automatically switch to the best mobile data option.