@sepehrsfmech: No it is not possible to dual boot PR1.1 and PR1.2. They would rely on the same rootfs etc and it would get messy, plus the cellular module would not work with PR1.1 as it has been software upgraded with PR1.2.
It is possible to dual boot. During PR1.1 I installed bootmenu and copied rootfs to eMMC partition. This gave me two bootable installations of PR1.1. I only upgraded 1 the rootfs on nand to PR1.2, so when booting from eMMC, I still have PR1.1.
If you want to do it now, after you installed PR1.2, you probably need to reflash PR1.1, clone to MMC, and then upgrade (or flash) to PR1.2.
I did not test cellular functionality, but it can probably be done in the same way that it was done for downgrading from leaked PR1.2 (see the relevant thread).
If you want to do it now, after you installed PR1.2, you probably need to reflash PR1.1, clone to MMC, and then upgrade (or flash) to PR1.2.
I did not test cellular functionality, but it can probably be done in the same way that it was done for downgrading from leaked PR1.2 (see the relevant thread).
My repository
"N900 community support for the MeeGo-Harmattan" Is the new "Mer is Fremantle for N810".
No more Nokia devices for me.