in survival mode to die played back with your experience and be was with armor she also back .not are losing the armor to die nor experience
Addition by @unknown:
When you die in survival mode, you do not lose your experience points or armour.
Steps to Reproduce
Gain xp and equip armour
Make sure you are in survival
(/gamemode 0)Die
(/kill)Observe that when you respawn, some xp remains and you are still wearing armour
Tested on Samsung TabPro SM-T520 on Android 4.4.2
Update:
As of 1.0.0.0 the player will lose armour and most xp upon death, but it seems that the player will always respawn with 2xp levels.
Gain xp in survival (eg /xp 500L @a)
Use the command /kill @p
Notice the xp level when you respawn
As of 0.16.1 clients connected via lan will not lose their xp when they die (they do not respawn with armour, however).