There's no conclusive scientific research yet on the impact of mobile phone radiation, but people who want to weigh up the risk should check out the below infographic.
The list has been published by German Federal Office for Radiation Protection (Bundesamt für Strahlenschutz) which maintains a comprehensive database of smartphones and the level of radiation they emit. The below infographic shows which current-day smartphones emits the highest radiation. However, apart from all the smartphones, the topmost smartphone with the highest emission rate will definately blow your mind, as the top of the list belongs to the well known Xiaomi's Mi A1 (Android One).
This is the list that nobody wants to lead and that as of now is dominated by the Mi A1, the Chinese-made Smartphone with Google's Android One that was released back in September 2017.
Forbes says "10 out of the top 16 smartphones on the list produced by Chinese manufacturers such as Xiaomi, Huawei, OnePlus and ZTE. Well known American smartphones do appear on the list as well, however, with three versions of the iPhone present." Feel free to share your opinions.