What number can be added before the other party's mobile phone number to send voice messages to the other party?

Unicom users dial 10 158, press "1" after hearing the prompt tone, and can start leaving messages after hearing the beep. The message lasts for 30 seconds. Finally, press "#" to end, and enter the other party's mobile phone number (Unicom user) to send. You can also directly dial "10 158+ the other party's mobile phone number" to send a message.

Mobile users:

Fee structure: phone bill+voice short message fee

Call charges generated by dialing 1, 12536: Local call charges are charged according to the local call charges of your brand, and when you roam, they are charged according to the specified roaming call charges.

2. Call charges generated when the called party receives the voice message of 12536: the local call charges of its brand are charged locally, and roaming charges plus long-distance charges are charged regardless of whether the called party roams in the province or across provinces.

3. Receiving the SMS of 12536 is free.

4. Sending voice short messages: charge by article, 0. 1 yuan/article, which is included in the short message fee.

You can call 12536 directly to use the voice short message service without applying for or canceling the service.