After xiaomi lenovo k6 power is the send best phone. Because all the major specs are in this phone.
On term of build quality the k6 power looks premium thanks ti its unibody desigywhich give best possible looks to phone and slim too.
Display is full hd ips panel and viewing angles are good. And there is a dolby digital sound in rear main loudspeaker which gives good sound effects.
You will get 3 gb of ram 32gb of internal storage. A fingerprint scanner at the rear side.
And a 3500 mah battery which gives a good backup.
Call quality is good in earpiece as well as loudspeaker . Its a good phone and the best part of lenovo is its after sale service is much better than xiaomi. That matter