How do phone cards work?

Answer Phone cards contain an allotted amount of time to use on long distance calls that you pay for upfront. Each card has a specific PIN number, which allows the card's service to track how many minutes... Read More »

Top Q&A For: How do phone cards work

Do sim cards work for any phone?

SIM cards do not always work for any cell phone, as most wireless providers lock their phones to their specific network. Putting a SIM card into a cell phone locked to a different company usually t... Read More »

If you have a 3G phone can you buy a 4G phone on Craigslist and it'll work if you tell the phone company that you want to upgrade to the 4G plan?

Phone Cards?……it's kinda hard to find....…this one is tot... Read More »

How Do HID Cards Work?

HID Cards use a technology similar to Radio Frequency IDentification (RFID) tags. They have an ID code that can be detected by a Radio Frequency (RF) reader. Unlike RFID chips, HID codes can be pri... Read More »