There are a couple of ways to know whether your phone uses a SIM card.
1. If you know who the service provider is for your phone, and it happens to be either AT&T, or T-Mobiles, then your phone does have a SIM card.
2. You could open the back of your phone and look carefully to see if you see a SIM card. If you do not see a SIM card, then gently remove the battery from it's compartment and look under the battery. If you see a SIM card, then your phone does use a SIM card.
Take the phone back, you cannot get it to work if the sim is not registered.
The sim card.
it does not have a sim card.
Put the SIM card from the new phone into the old one. Copy the contacts from the old phone's memory to the SIM card. Put the SIM car back in the new phone - then - either copy the contacts to the new phone's memory - or leave them on the SIM card. Either way - the new phone will find them.
no actually not the phone companies its the sim card company
If the phone is from the same carrier then yes, it is very simple. If you were to try and put, for example, a T-Mobile SIM into a Cingular phone or vice versa, you will need to "Unlock the phone" first.
A SIM free phone is one that does not have a SIM card included with the phone. This type of phone may not be able to be used with all networks. Some networks require a SIM card.
A phones sim card is a small card that holds information such as contact, programs and games that have been imputed into a phone. The sim card is not what connects the phone to the internet.
Sim card
The sim card will only work in a different phone if the phone is ulocked, in not, no
It could just be that the SIM card has gone bad, They can be changed out easily by your carrier.
If the phone is unlocked you should be able to put any type of sim card in there as long as it is a GSM phone with a sim card slot.