How to tell whether Apple 6 mobile phone has a built-in card sticker?

1, look at the signal. Look at the signal first. If your mobile phone shows 4G, but it feels like 2G speed, it is a built-in card! Because the built-in card stickers are generally very cheap, you can't upgrade, you can only distinguish 2G signals! 4G is not written internally, nor is it written with hidden software.

2. Upgrade the system. Because the built-in card can only temporarily unlock your phone in a certain system. Once the system is upgraded or restored, the Apple server will naturally capture that your mobile phone is locked, and then it will naturally lock, and the mobile phone will not display the service, even the 2G signal will be gone. This is not easy to use, because once upgraded, the phone will switch to pod immediately.

3. Dismantle the machine. The simplest thing is to be able to see it immediately. Whether the card is connected to the SIM card holder through four flying wires, or whether the mobile phone is unlocked to 4G.

Extended data:

Method for identifying built-in card stickers:

1, the number of messages received will be displayed before +86, which is the feature of the built-in card.

2. iphone5s and 4S can be set through->; General->; About this machine->; Let's check the operator. If the operator's name is English or Vodafone IE 14.0, it may be a built-in card pasting machine, but it is not absolute (this method is controversial, and reference is given priority to).

In addition, iPhone 4 can see the baseband certificate, which is generally 257, and Demon Opportunity displays 0 (this method is only applicable to iPhone 4).

3. use the SIM card of the mobile phone to surf the internet. The built-in card can only surf the Internet through 3G when data roaming needs to be started, and the unlocking machine can only surf the Internet when mobile phone data is turned on.

4. We can also check the IMEI number through the following two foreign websites to know whether there is a lock. The authority of this site is not clear, mainly for reference.