Why i cant browse all options of my htc one m8?????

[AC Question]

Hey there,I am using HTC One M8 Demo unit and i cant use all the options of it also i loose all data from phone memory automatically,e.g-Call history,apps,contacts etc.
Need suggestions regarding this annoying problem,

 

[anon8380037]

Maybe because it's made as a demo unit. Were you sold it as functioning fully?

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