A SIM card, or subscriber identity module, is a small card in your cellphone that lets you place phone calls, send text messages, and more.

Using files known as vCards, you can easily transfer contacts to your Samsung Galaxy S10 from an Android or iPhone. Here are two ways to do it.

The cameras are perfectly serviceable for a phone at this price point. You’d be working with a 5MP lens on the back of the device with a 2MP selfie cameras on front for quick pics and video calls. The ...