no actually not the phone companies its the sim card company
i need a sim card for call box (tecno phone)
No A phone card usually refers to a kind of charge card, something you pay with. A SIM-card is what gives a cell phone its number, it's identity.
It depends on your phone but sim cards are often used to boost performance on downloads I would get a sim card for ur phone
iPhones need a SIM card to work as a phone. If you don't have a SIM card you can use it as an iTouch.
No - the SIM card will work in any phone that has been unlocked from a network.
No.
No you don't
No, you should not sell your SIM card. You can sell your phone without SIM card. SIM card identifies you and your phone number registered with the mobile service provider. **Some one can misuse it. If you no longer need it, confirm that all the services linked with your SIM card and old phone number are deactivated and then destroy it. - Neeraj Sharma
Not necessarily - a 'memory card' is simply additional storage. The SIM card does all the work of connecting your phone to the network.
Buy a different phone or contact Verizon support.
It sounds like your phone is locked to a specific network (not the network for your SIM card). You might need to get it unlocked before you can use the SIM you have.