Questions about Iphone 3G

Except for the Hong Kong version, other countries are bound to a mobile phone service provider, that is, you can only use the SIM card of this service provider, which is what we call the locked version, and the versions of different countries are locked service providers, but they are all built-in Chinese, and there is no difference in function.

The cracking team dev team will release the cracking software on January 1, 09, so no matter when you buy it, you can unlock it by then, that is to say, you can use it with a SIM card at will.

If you can buy the Hong Kong version, try not to buy the American version Although the cracking software is coming out soon, but the stability is not known yet, the Hong Kong version itself is not locked, and the stability should be guaranteed.

8G from 4000-5000 is possible, and it doesn't matter which version it is, because it has to be unlocked except for the Hong Kong version.

Here's a feature comparison that can be taken a look at.

But in this comparison, the things that the iPhone doesn't support can basically be done by installing third-party software, such as MMS, video recording, text messages**, etc., and the so-called service fee of Apple software can also be cracked.

The Hong Kong version is almost the same as the orthodox licensed! Multiple 3G features! The U.S. version is a card sleeve added by the dealer, and the SIM card is inserted! At present, there will be four or five hundred price differences around the country of about 4100! Float!

Causes and solutions:

1. The mobile phone is not connected to the 4G network. If the mobile phone has not been replaced with a 4G card or has not opened the 4G network, it is generally possible to use the 3G network if 4G is turned on. You can call the operator** to consult, whether the mobile phone card has opened the 4G network, and whether the 4G service has been opened.

If not, it will be enabled or directly upgraded to a 4G network.

2. The area is not in the 4G signal coverage. In many places, the signal coverage is not very comprehensive, and the signal coverage is not very strong, such as parking lots or underground shopping malls will also be unable to use the 4G network due to the lack of 4G signal coverage, and then reduce to the 3G network standard. You can connect in a different place and check if you can use the 4G network.

3. Change the mobile network type setting. If the mobile network type is set to use only 3G models, then the phone will turn off 4G Internet access and only use 3G Internet access. In this case, you can change the network type in the phone settings, change it to 4G priority, and you can restore the 4G Internet access of the unregistered family.

4. The mobile phone system is abnormal. In this case, you can restart your phone.

Reasons and methods:

1. The 4G network is not opened.

If the mobile phone is not replaced with a 4G SIM card or has not opened the 4G network, it is generally possible to use the 3G network if the 4G is turned on. For Unicom telecom card, in fact, there is no need to change the card, and you can directly upgrade the 4G network.

2. The area is not in the 4G signal coverage.

Confirm that the iPhone is using a SIM card that supports the 4G network and has opened the 4G network, but after the 4G network is turned on, the displayed target is the 3G network, which is mostly caused by the lack of 4G signal coverage in your area. The winner asked the local regional operator if it covered 4G in the area.

Extended Information: Bugs where mobile phones sometimes change from 4G to 3G or 2G:

1. The strength of the mobile phone signal is related to the environment in which the mobile phone is located, and it is difficult to receive the mobile phone signal in some places with strong shading, such as in the basement or in the elevator.

2. The density of the building will also affect the strength of the mobile phone signal, and the more complex the layout of the building, the more difficult it is to receive the signal.