How do you know the iPhone is unlock or lock?

Answer 1

To unlock a cell phone means you are unlocking the restrictions on it which only allow you to use it with the designated service provider.

Read more: http://wiki.answers.com/What_does_its_mean_to_unlock_a_cell_phone#ixzz1e7UTEdLC

Answer 2

You can put a SIM from just about any network in the device and make or receive a call!

Otherwise you could go into an Apple care store and ask them to tell you. If you cannot trust a seller that it is unlocked before you buy it off of ebay or some electronics store, you may want to purchase a Network Locator service. This will tell you where the iPhone was purchased, model and specs, (optionally) if its stolen, and if is is carrier locked or not.

Companies like iFactoryUnlock provide the service and it is almost instant in most cases.

Answer 3

Phones can become unlocked in various ways. Be careful, however because in some instances this may be illegal. Depending on the type of phone one may have, unlocking it is not at all possible.

Answer 4

Try a sim card from a different carrier. If the phone works with the new sim card, then it's unlocked.

Answer 5

Try a different SIM in it and you will soon see.

Answer 6

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Answer 7

Don't buy it online then you know

Answer 8

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