"This number doesn't exist" sometimes appears suddenly when sending a text message.

1。 The solution to the problem is to let the sender set "provide concentric reply" to "not provide" in his mobile phone.

2。 It would be easier if it was only a stopgap measure. B Select "New" instead of "Reply" to SMS, and then look up the phone book and/or enter the number directly.

Cause analysis:

The message "This number does not exist" appears in the SMS of Nokia.

Recently, I saw the phenomenon that "this number doesn't exist" when I sent text messages on some Nokia forums. Some friends who don't understand mistakenly think it is a software BUG, but it is not. This issue has been discussed in depth in the Nokia 66 10 forum. Let me explain again: generally speaking, there are two kinds of situations.

One. Interconnection between China Mobile and China Unicom. Take Nanjing as an example. In 2002, for a period of time, Nanjing Mobile users sent it to Unicom users, and it often appeared that "this number does not exist". This kind of interconnection problem completely belongs to the network, and has nothing to do with mobile phones, and all kinds of mobile phones will happen. Fortunately, with the solution of the interconnection problem, this situation is rare now.

Two. It is the "this number does not exist" that everyone often encounters. When this happens, the following conditions need to be met.

1。 In the setting of SMS, the mobile phone supports "providing concentric reply" and the sender of SMS is set to "providing". For example, Nokia 66 10: menu-message-message settings-SMS-sending settings-preset mode-concentric reply-"provide/not provide".

2。 After receiving the short message from Party A, Party B directly chooses "reply" instead of "create", and then looks up the phone book and sends it. "New" will not happen.

3。 The SMS center number of the sender's mobile phone must be different from that of the responder. For example, the sender A is Beijing Mobile and the receiver B is Nanjing Mobile, or a Nanjing Mobile and a Nanjing Unicom.

Let me analyze the process of the problem in detail.

1。 First of all, both mobile phones of Party A and Party B must support "providing concentric reply", and Party A, the sender of short messages, must enable this function. After activation, the additional information of the short message sent by Party A will be added to the "Number of Party A's Short Message Center" for Party B to reply to this message (it is estimated that foreign networks are designed in this way and need to be provided by the other party). At the same time, only the mobile phone of the receiver B also supports this function (no activation is required), so that it can be read and recognized correctly. If the mobile phone of the receiver B does not support this function, it will not recognize the attached SMS center number and will choose to ignore it.

2。 If the sender of the short message A activates "providing concentric reply" in the mobile phone, the additional information of the short message received by B includes "the short message center number provided by A". At this time, if B directly selects "Reply", the mobile phone will recognize the "short message center number" provided by A and use it as the short message center number provided by B to reply to this short message (only valid for this short message).

When Party A activates "providing SMS center number", if the receiver Party B chooses "New" to reply (instead of directly selecting "Reply"), there is no process of "Party B reading and identifying the SMS center number provided by Party A as the SMS center number for replying to this message". B's mobile phone will send messages according to the original SMS center number setting, and there will be no problem of "this number does not exist".

3。 As we all know, sending a text message is to send the text message to the number server in your SMS center first, and then the server forwards it-to the number you want to send. If both parties are Nanjing Mobile users and the SMS center numbers are the same, when Party B replies, it can still use the SMS center number of Party A as its own SMS center number to send SMS normally. Because the SMS center numbers of both parties are exactly the same. Only when the SMS center numbers of Party A and Party B are different, for example, the sender A is Beijing Mobile and the responder B is Nanjing Mobile. When replying to the short message, Party B takes the number of Party A's short message center in Beijing as its own short message center number. How to send it? Of course, the message "This number doesn't exist" should be prompted, because Nanjing Mobile users can't send short messages to the server of Beijing Mobile SMS Center.