In New York the police department went for Windows mobile phones two years ago;
Now they are useless because the platform is dead so they have to throw away 36000 Nokia Smartphones with Windows.
This was fairly obvious two years ago too with Windows only having 2 % of the mobile phone market, but the NYPD spent $160 million and the Mayor Bill de Blasio declared it to be:
a huge step into the 21st century
So right about when the last phone was delivered they needed to be replaced.
The choice was between Android and Apple.
This time Apple was chosen in good "tax payer tradition" meaning that Apple phones are clearly more expensive than Android phones.....and slightly worse IMHO,
More here