Newland SPEEDATA SD35, Руководство пользователя

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SD35 User guide V1.0
15
Sound
Click settings->Sound,you can set the volume, call vibration, mobile phone
ringtone, etc. according to your needs.
Note:There is no sound during the use of the device, you can enter the
ringtone setting, check whether the volume setting is too low, and check
whether the "Do Not Disturb preferences" is turned on by mistake.