In most cases it is most certainly the vendors who install custom roms before shipping to overseas customers. Any one who have ever bought grey imported chinese phones should be familiar with this; flashing official, custom roms yourself is a necessity.
1. The NSA have been implicated in economic hacking/spying/espionage throughout the Snowden leaks.
2. The only - ONLY - country to have engaged in cyber WARFARE, is the United States; by unleashing stuxnet/flame on another sovereign state.
This is beyond hypocritical of the Americans. Not only does the US violate their own and international laws but to have the gall to stand in front of the world and sanctimoniously blow their own trumpet, it's disgusting.
The best part about a democracy is when the losers respect the electoral process, but this same logic seems to escape many liberals when in comes affairs of foreign countries, so they'll blindly bandwagon any rebel without a cause. Or, perhaps you aren't liberal and simply view civil strife as being good for western(American)interests - in which case you are a fit to work for the white house.