14.8% of all users attacked by malware or adware in the past year suffered an infection of the system partition. Cybercriminals behind it stop at nothing that will earn them money from advertising (or rather, the forced installation of apps) As a rule, 15% of the total number of users of our security solutions encounter this adware (depending on the particular device brand) In the main, these are owners of smartphones and tablets of certain brands in the lower price segment. For some popular vendors offering low-cost devices, this figure can reach up to 27%.”]
Source: https://securelist.com/pig-in-a-poke-smartphone-adware/97607/