1 Why can't I adjust the volume of the ringtone?

1. Please check whether the volume of the mobile phone reaches the maximum or minimum, and the volume cannot be adjusted.

2. Under the standby page, try to adjust the volume.

3. If it is invalid, back up the data and restore the mobile phone to the factory settings.

One Plus was founded on 20 13, and its headquarters is in Shenzhen, China. The original intention of one plus mobile phone is to create the best Android mobile phone products for users and share high-quality technology with the world in the form of "only making high-quality products".

On July 28th, 20 15, one plus mobile phone officially released the second generation of one plus mobile phone in Beijing. 20 15,10/on the afternoon of October 29th, three months after the release of one plus mobile phone 2, one plus technology held a new product launch conference in Beijing, and released the basic version, standard version (glass version) and ceramic version of one plus mobile phone respectively, with the price starting from 1499 yuan.

20 18 17 at 00:00 am on May 10, one plus technology held a new product launch conference in Beijing, and released the one plus mobile phone 6, which has been attracting everyone's attention.

The 6-bright porcelain black back shell of one plus mobile phone is made of glass, and the 6-layer nanotechnology makes the glass look like bright porcelain. In addition, there are two colors: black ink and crescent white, both of which are made of glass. On July 19, 17, China Quality Certification Center official website (3C certification), eight 5G mobile phones obtained 3C certification, including one plus seven.

Professional 5G version.

In the name of one plus, "1" stands for "status quo", "+"stands for "better, more possible", and "one plus" is determined to pursue better.

"NEVERSETTLE" not only represents a brand concept, but also represents a driving force for progress. One Plus was founded by some young people who love products, and they have persistent pursuit of products. One plus hopes to bring high-end products to those who have a "no will" attitude towards life.