Yes they have pin numbers or code numbers
Buy a different phone or contact Verizon support.
Depending on if you save stuff on your sim card, just take it out and put it in another phone
Droid x 3. from what i understand any verizon phone with a sim card. The sim card makes it a world phone.
no
Yes you can take the sd card out of the phone
SIM card is usually accessable under the battery. Remove the battery and there you should see the card. I am not familiar with either phone but that is generally how it is done But Verizon does not have sim's cards. Y-THINK-Y
Yes, you can flash a Verizon phone to ATT. However, you will also need to insert a Verizon SIM card into the ATT phone in order for it to properly work.
Yes, under the battery
TMobile and Verizon are incompatible. As are every other two separate phone services. The only way to use a TMobile sim card in a Verizon phone, is to get the Verizon "unlocked". You can do this at most mobile phone shops, but not all of them and most likely not an official Verizon or TMobile shop. This will cost you.
yes its a world phone
Sims are a card that holds the phones number and basic information. A sim free one just does not have this option so a store has to switch numbers from phone to phone.
The G'zone does not have a SIM card, nor does any other Verizon Wireless phone.