I used vivox7 before, and it felt ok, but because I took it swimming in the water, I changed it to x9. I think the same brand should do similar things. The advantage is that the photo is really good, but the disadvantage is that the x9 used for 8 months has frequent flashbacks and frequent restarts. Many foreign software can't be downloaded, the sound effect is not as good, and there is no cost performance. I regret that I didn't fully understand the mobile phone when I bought it. It's ok to buy an official mobile phone for 500 yuan.