Thanks,
Batuhan
I'm using windows usually and it's the first uefi entry so w700 automatically starts with windows as normal.
On the other hand I installed Ubuntu and android on same ext3 partition and configured grub 2 to directly boot android as first choice than deleted all Ubuntu folders and stuff.
Now when I need android, I just start bootnext on windows desktop and boot grub. After turning off android, w700 continues to boot windows again.
For our friends who doesn't understand my method, w700 only has volume keys, windows key and a power button. So any boot list, grub or not, is not accessible if you don't have a physical keyboard around which is a silly thing because my machine is a tablet and I don't always have a keyboard with me. Take care.