What's the explanation of mobile phone call forwarding?

There are four kinds of call forwarding: unconditional full forwarding, power-off forwarding, busy forwarding and no answer forwarding. The explanation is as follows:

1, unconditional transfer:

Open SMS command: **2 1* Phone number to be transferred # Press the call key;

Cancel instruction: ##2 1# Press the call key;

Inquiry instruction: *#2 1# Press the call button;

2. Closure and transfer:

Open SMS command: **62* Phone number to be transferred # Press the call key;

Cancel instruction: ##62# Press the call key;

Inquiry instruction: *#62# Press the call button;

3. Transfer when busy:

Open SMS command: **67* Phone number to be transferred # Press the call key;

Cancel instruction: ##67# Press the call key;

Inquiry instruction: *#67# Press the call button;

4. No response transmission:

Open SMS command: **6 1* Phone number to be transferred # Press the call key;

Cancel instruction: ##6 1# Press the call key;

Inquiry instruction: *#6 1# Press the call button;

Tips:

( 1)? If international roaming customers use call forwarding, it will lead to two-way international long distance and the cost is high. International roaming customers are advised to choose this service carefully.

(2)? When setting the call forwarding number, in addition to the digital mobile phone number, voice mail number and network paging station number, the long-distance area code (including local fixed telephone) must be added before other phone numbers.

(3) Except unconditional transfer, the other three call transfers can be used at the same time. To clear all call forwarding settings, press ##002#, and then press the send key; Or follow the menu prompts of the mobile phone.

Pre-use setting

Call forwarding can be set according to the menu mode or coding mode of the mobile phone. The effect of the two settings is the same, and both settings can be used.

(1) Mobile phone menu setting: Please refer to the instructions in your mobile phone instruction manual for specific setting methods.

(2) Setting according to the coding mode of the mobile phone.

Extended data

In the mobile network, if the number preset by the user includes: fixed or mobile phone number, GSM Chinese short message station, voice mail number, automatic pager number. Then users have four different types of call forwarding services.

CFU (Call Transfer Unconditional), whenever a subscriber has a new call, the network will automatically transfer the call to the number preset by the subscriber. No matter what the current status of the called subscriber is, whether it is turned on or not, the mobile phone will not ring.

CFB (Busy Call Forwarding), also known as Busy Forwarding, means that if the subscriber who signed up for the service has a new call while talking, the network will automatically forward the subsequent new call to the user's preset phone number.

CFNRy(Call Forward No Reply) means that if the phone of the subscriber who signed up for the service rings within a certain period of time and no one answers (preset answering time, for example, 30 seconds), the network will automatically transfer the call to the preset phone number. Depending on the model of mobile phone, the ringing time is not exactly the same, usually 30-60 seconds.

For example, the customer sets the time for answering the phone without forwarding to 20 seconds. When the mobile phone calls, the customer can answer normally within 20 seconds after starting to ring, and if the phone does not answer after 20 seconds, the call will be forwarded.

CFNRc(Call Forward No Reachable) means that the network doesn't know the current location information of the user, such as the cell phone is turned off, and the user reaches the blind area covered by the network (not in the effective service area, poor signal). At this time, when he is called, the network cannot page the user. At this time, the network will call the incoming call to the phone number preset by the contracted user.

References:

Call forwarding-Baidu Encyclopedia