Flashing steps

For voltage os miatoll

1) Use latest Orange fox fbev2 Recovery

2) Boot To Recovery And Wipe dalvick , data, cache

3) Flash Rom Zip File

4) Format Data

4) Reboot Recovery And Flash Gapps (recommended for a10 u can flash gapps without reboot on later android versions)

5) Reboot system

Dirty Flash

1) Wipe Dalvick Cache ( Don't wipe data ) Flash ROM file

2) Reboot system ( Flash Magisk After first boot if you are rooted before , Flash Gapps package if you used before)

Keep in mind

If u coming from a11,12,13 and going to flash a14 rom , must format data after 1st boot of rom to avoid attachment not supported or storage related bugs