1. Z2 cannot be serviced , atleast in india and you have to get it replaced for free within a month
2. After that they offer you 80% buyback discount for replacement.
Also, it has been evident from indian topic thread here that z2 has lot of build issues and i really don't want to invest 45k on a phone and then land up with a un-serviceable phone or getting into a situation where i have to spend another 20% of the cost for a new phone.