Format Data is stronger than Wipe Data. Therefore, since you do Format, you don't additionally need to Wipe (but you can always do if you like - eg, you can repeat Format seven times, it is not necessary but it will not make any harm)I using rom now is "xiaomi.eu_multi_HMK40_POCOF3_V12.5.19.0.RKHCNXM_v12-11" , than if i install "xiaomi.eu_multi_HMK40_POCOF3_V12.5.3.0.RKHCNXM_v12-11" that mean i am doing Downgrade... So is it below installation step i need add "Wipe" (below read) before install Zip or no need ? Also after install ROM zip need format data ?
Installation via TWRP:
- Download zip to internal storage
- Updater - Menu (...) - Reboot to Recovery
- Wipe -Data, system cache ?
- Install - Select zip
- Format Data ?
- Reboot
- Done
Similarly, by Formating Data you already Wipe Cache, hence that step (Wipe Cache) is also not necessary (but won't make any harm to do, except for loosing some second of your life