Higher Earpiece volume having mobile phones


Hello Everybody

I have Google Nexus 5X mobile phone right now.
I am looking to buy a mobile phone with equivalent earpiece volume as Nexus 5X but within 11k budget.
But i am unfortunately not finding any possible way to understand which mobile phones output high earpiece volume as every reviewers are concentrating on loudspeaker volume including GSM Arena,

We cannot test the performance of earpiece output even at mobile phone outlets as it requires lot of work and most of the new breed of some specific brand's mobile phone are not with them.

Online stores won't accept returns if earpiece volume is not adequate.
So, what is the solution for my problem?