How to solve the problem that CHN-CT LTE can't accept and send short messages when the unlocked German 8p telecom card appears?

German version is rare, but it makes no difference. Like Bank of China, it has the same functions except dual card. Can't accept text messages, and can't send text messages. Maybe your subscription message is over, or the operator has network problems recently. It is recommended to reinstall the SIM, which should be no problem.

Network lock:

Network lock is a way to restrict users from choosing operators. The phone number card used by iPhone with network lock can only be used by operators locked by network lock. If you want to use other operators' calling cards, you must escape from prison.

Locked version:

IPhone has a locked version, such as the American version of AT & amp； T, O2 In Britain, this kind of mobile phone can only be used by plugging in the SIM card of the corresponding operator, but it can't be used by plugging in other cards. People usually call this machine Xiaobai.

Under normal circumstances, this locked version of the iPhone will sign a one-year or two-year network access agreement with the operator, bind the number card information, agree on the consumption quota of the monthly phone bill, and then buy the mobile phone at a discount or for free, which is what we usually call a contract machine.

Unlocked version:

The unlocked version of the iPhone is also called the official unlocked version, such as the unlocked version of Hong Kong Bank or United Arab Emirates (Hong Kong also has Hutchison Whampoa's "3" customized iPhone). Although the price of this unlocked iPhone is relatively high, one advantage is that you can choose any carrier's SIM card without any restrictions.

Price difference:

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.