IPhone has a locked version, and the price is equivalent to the contract signed with the operator. Generally converted into monthly phone bill consumption. If the monthly fixed consumption is reached, the monthly phone bill can be used according to your own needs after the contract expires. However, you can only use the SIM card of the binding operator.

However, the unlocked version of the iPhone is more expensive. In Chinese mainland, there is basically a locked version of the iPhone, while the unlocked version of the iPhone is only available in China.

2. Use differences

IPhone has a locked version, so it can't upgrade the latest official system in time. Even if it is upgraded, it needs to be unlocked again. Every time we upgrade, a file in the mobile phone, which we call "baseband", will also be upgraded, so that the mobile phone can't recognize the previous jailbreak unlocking program and can't be downgraded.

After unlocking iPhone jailbreak, you don't need to spend money on software and games. The unlocked version can be said that no matter how you play it, it will not become a brick.

3, the difference between operators

The lock-free version of iPhone can choose any carrier's SIM card, and can help the iPhone to activate and use normally.

The locked version of iPhone can only use the SIM card of the bound operator, which has a fixed consumption quota.

Baidu encyclopedia-Apple mobile phone