If for some reason Vivo X21 UD commences having issues, you should not panic! Just before you start checking for deep errors in the Android os, you should check to make a Soft and Hard Reset of your Vivo X21 UD. This adjustment is going to be reasonably simple and can solve issues that can alter your Vivo X21 UD.
Just before accomplishing any one of the hacks in this article, take into account that it truly is essential to make a backup of your Vivo X21 UD. Albeit the soft reset of the Vivo X21 UD is not going to result in loss of data, the hard reset is going to erase the whole data. Do an entire backup of the Vivo X21 UD thanks to its software or perhaps on the Cloud (Google Drive, DropBox, …)
We will start with the soft reset of your Vivo X21 UD, the easiest solution.

How to Soft Reset your Vivo X21 UD
The soft reset of the Vivo X21 UD will permit you to repair small errors such as a crashed application, a battery that heats, a display that stop, the Vivo X21 UD that becomes slow…
The methodology is undoubtedly easy:
- Simultaneously push the Volume Down and Power key until the Vivo X21 UD restarts (approximately 20 seconds)

How to Hard Reset your Vivo X21 UD (Factory Settings)
The factory settings reset or hard reset is without question a bit more definitive possibility. This method is going to remove all your data of the Vivo X21 UD and you are going to find a mobile phone as it is when it is created. You should really keep your principal data such as your images, emails, messages, movies, … on your pc or on the cloud such as Google Drive, DropBox, … before starting the hard reset process of your Vivo X21 UD.
To retrieve all your info following the reset, you should keep your documents to your Google Account. To do that , head to:
- Settings -> System -> Advanced -> Backup
- Activate the backup
Once you generated the backup, all you should do is:
- System -> Advanced -> Reset options.
- Erase all data (factory reset) -> Reset phone
You will be required to write your security code (or PIN) and soon after it is made, go for Erase Everything.
The Vivo X21 UD is going to get rid of all the data. It will take a short time. Now that the operation is completed, the Vivo X21 UD is going to reboot with factory configuration.
More ressources for the Vivo brand and Vivo X21 UD model:
About the Vivo X21 UD
The size of your amazing Vivo X21 UD is 74.8 mm x 154.5 mm x 7.4 mm (width x height x depth) for a net weight of 175 g. The screen offers a resolution of 1080 x 2280px (FHD+) for a usable surface of 88%.
The Vivo X21 UD smartphone makes use of one Qualcomm Snapdragon 660 MSM8976 Plus processor and one 4x Kryo 260 2.2 Ghz – 4x Kryo 260 1.8 Ghz (Octa-Core) with a 2.2 GHz clock speed. This excellent smartphone incorporates a 64-bit architecture processor.
Related the graphic part, the Vivo X21 UD functions with the Adreno 512 graphics card with 6 GB. You can make use of 128 GB of memory.
The Vivo X21 UD battery is Li-Polymer type with a full charge power of 3200 mAh amperes. The Vivo X21 UD was revealed on March 2018 with Android 8.0 Oreo
A problem with the Vivo X21 UD? Contact the support: