The Viv0y67a line has changed to Viv0y67 after it was flushed. Please provide customer service to help solve the problem. The network used to be 4g+, but now it has become 4g. The signal is not as good as before. Please provide customer service to help solve the problem
Take a look at the firmware operation. This is the link to download the firmware package of the machine:http://www.vivo.com/download/110.html;After you download it, do not unzip it, but copy it directly to file management -- all files are in the root directory, and follow the tutorial at the following URL,http://bbs.vivo.com.cn/forum.php ... Amp; fromuid=2860629 (Before firmware operation, please back up important data, and then clear all data before firmware operation).