Why can't oppo R9 send short messages in groups?

If you want to send short messages in groups, please refer to the following path:

When entering a message, editing a message or sending a message, click "+"-Group (or contact person)-select the group (or contact person) that needs to send a message on the right side of the recipient input box, enter the message content, or directly enter the phone number in the recipient input box and click Send.

Note: You can join 200 contacts to send messages at a time.

Due to different mobile phones and different versions, the number of group SMS messages is as follows:

The upper limit is 500: X903, R807, R805, R80 1, 6607 (u3);

Upper limit 300: T703, X905, X907；;

Upper limit of 200 pieces: Except the upper limit of 500 pieces and 300 pieces, all models are 200 pieces.