With a pick axe
You can not build armor in minecraft pocket edition armor does not even exist in minecraft pocket edition.
Yes there is signs in Minecraft Pocket edition
you cant have a minecraft pocket edition username
No, they are no enderman in Pocket Edition of Minecraft 0.8.1
At the current time, it is impossible to mod Minecraft: Pocket Edition.
There is no way to get to the End in Minecraft Pocket Edition as of Update 0.8.1
Yes, there are villages in the updated Minecraft Pocket Edition.
When would Minecraft Pocket Edition 12.1 going to be out
Minecraft pocket edition does not have all the features of PC and Xbox Minecraft. There is no food.
As of Pocket Edition 0.3.0, cows have been part of Minecraft Pocket Edition. If you have that version or above, then there should be cows.