How to estimate the number of users with an Android phone in St. Petersburg?

Question

Android

Maybe some research has been done on this topic?

Answer 1

>>Russia (shame on me)

Answer 2

Well, maybe cuts were made (for sure, they are constantly made by large networks such as Euroset or Svyaznoy). But, as a rule, they do not like to share such data right away.
Yes, and such cuts will be doubtful. For example, I live in St. Petersburg and I have 4 Android devices. The set of third-party software on each does not really match.
Tip: find out the numbers of mobile users in St. Petersburg, the percentage of Android users in Russia, compare and dance from the result. The pepper is clear that it will be inaccurate, but you will have some idea.