Will i need to install WP8.1 again at the time of availability of W10M for my phone.
If I install build 10.0.10586.107 on my lumia 640xl via insider release preview, then will I need to reinstall wp8.1(via recovery tool) when official W10M is available for 640xl.
If I install build 10.0.10586.107 on my lumia 640xl via insider release preview, then will I need to reinstall wp8.1(via recovery tool) when official W10M is available for 640xl.