A guide comparing pocket WiFi and SIM cards to stay connected while traveling in Japan.

I'm not buying the eSIM hype — physical SIM cards are more reliable and make you less dependent on your cellular carrier.

Have you ever wondered exactly how a SIM card works? We’ll help you understand why your phone needs one and what they do to keep you connected. Image: TalkAndroid Editorial Note: Talk Android may ...

A SIM card, or subscriber identity module, is a small card in your cellphone that connects you to the network. Your SIM card contains your phone number, and lets you make phone calls, send text ...