[Jason Gin] wanted to reuse the SIM card that came with a ZTE WF721 wireless ... All [Jason] had to do then was put the SIM in his phone and punch in the sniffed PIN when prompted.

Just because carriers and smartphone manufacturers are phasing out SIM cards doesn't mean you have to switch to eSIMs just yet. It's better to buy a phone that supports eSIM and has a physical SIM ...

A multi-carrier GSM phone with two, three or four SIM cards. Dual-SIM phones are popular with global travelers who use local and foreign carriers as well as people who want a business and personal ...

Power down the phone, then replace the old SIM card with a SIM from a different network. Check that the iPhone is able to connect a phone call over the new network. That’s the short version ...