Why is there no sound when oppor9 sends a text message?

The reason why there is no sound in SMS:

Confirm whether the incoming call volume is adjusted to the maximum (phone settings-sound-volume-ringtone and notification);

First, confirm the source of the ringtone, whether it is a self-contained ringtone or a downloaded third-party ringtone. You can change different ringtones and try to see if there is a sound in the incoming call.

If it is still silent, please back up the data, restore the factory settings of the mobile phone or try to upgrade to the latest version.

The name design of OPPO R9 has a metal middle frame design on the number 9, which seems to indicate that OPPO mobile phones will have different performances in the middle frame design.

The details on the right side of the R9 mobile phone fuselage are ultra-thin and round, and the color of the metal frame is local gold. R9 continues the ultra-thin fuselage design of R series, the fuselage thickness is 6.6mm, and the integrated metal fuselage ensures the strength of the whole machine.

A distinctive waistline was created on the side of R9, with smooth lines and slimmer body.

R9 adopts a very narrow border design, and the border is almost invisible on the front. When it wakes up, the full and bright display will give people a visual feeling of curved screen.

The R-series mobile phones mainly focus on "taking photos". This time, the OPPO R9 mobile phone emphasized this point with the "brand new camera phone". Built-in beauty 4.0, front beauty camera16 million pixels, pixel reconstruction technology, fault tolerance and noise reduction effect is better. Beauty 4.0 technology is defined in any light environment, with "face exposure first, skin color restoration more natural" as the imaging benchmark.