Zte A16 User Manual page 52

(The prompt modes depend on your settings.) The number of messages your
phone can save is up to the SIM card capacity.
Creating Messages
Please confirm message service center number has been set before writing
messages.
In message interface, select New Message and press OK key to access
message input interface to enter the message. (Please refer to Chapter "Text
Input".)
When you finish entering the message, press OK, and then use Up/Down key
to select Send to One, Send to Many or Save.
Select Save to save messages to the SIM card. When saving, you can directly
input the destination number according to prompts on the screen, or enter Names
and then select number in the Names. Select Send to One, you can directly enter
the recipient party's number, or press Names to select number. Select Send to
Many, you can bring out the Groups and select the recipient from the selected
Group. There will be prompt information on the screen after the message is sent
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