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Xiaomi Mi A1 tops the list followed by OnePlus 5T while Google Pixel 3XL ranks 7 and iPhone 7 ranks 9.

OnePlus 6T may be one of the largest selling mobile phones and topping those sales charts all over, but the phone appears to be figuring among the top phones that have high levels of radiation. And another brand that is similarly seen to be emitting high levels of radiation is Xiaomi. The two brands, together, account for more than 50% out of the 16 worst-ranked phones in terms of radiation emissions. This data comes from a research conducted by German Federal Office for Radiation Protection. Based on the data from this research, Statista compiled a list of top 16 smartphones emitting the most radiation.

According to the list, the worst offender is Xiaomi Mi A1 and coming second is OnePlus 5T. The unit of measure is watts per kilogram and the figures for these two devices are 1.74 and 1.68 respectively. Interestingly, Samsung phones are appearing at the bottom of the list, meaning the radiation levels in their phones are quite low.  

Among the other models that figured in the top of the list Mi Mix 3 and OnePlus 6T, again from these two manufacturers itself. Google Pixel 3XL is listed in the 7th position while the iPhone 7 is at the 9th position.

As mentioned, Samsung has emerged as the best brand in this research with not a single entry among the highest radiation emitting phones. On the other hand, A number of Samsung phones draw up the list of least radiating phones. These include Galaxy Note 8, Galaxy A8 (2018), Galaxy S8+, Galaxy S7 Edge, and Galaxy S9+. Apart from Samsung’s models, the other phones to be listed among the less harmful of smartphones there are ZTE Axon Elite, LG G7 ThinQ, HTC U11 Life, and Moto G5 Plus.

The factor to be considered here is that there is as such no universal acceptable standard as far as the radiation emission is concerned. Germany, however, has a certification organization that goes by the name Blue Angels ('Der Blaue Engel', in German) that has fixed a limit of 0.6watts per kilogram below which it refuses to certify phones for sales in the country from the environment friendly perspective. Many top models may fail this test.