In an email, OnePlus co-founder Carl Pei said its partnership with Cyanogen was "mutually beneficial," although the two companies appear to be taking different paths in the near term.
"We wouldn't be where we are today without this joint effort," Pei added.
Cyanogen executives said they wished OnePlus the best, but they're quickly moving on to new opportunities.
"OnePlus shipped reasonable volume, but nothing compared to what some of these other partners can ship," McMaster said. "So we are working with partners that can scale much quicker."
Sign up for CIO Asia eNewsletters.