YU Televentures Ltd, a subsidiary of Micromax, has asked budding programmers to develop AOSP (Android Open Source Project) v6.0 Marshmallow to all the four smartphones -- Yureka, Yureka Plus, Yuphoria and Yunique.

This announcement from Yu has lead many to believe that the company might have possibly severed ties with the official software provider Cyanogen.

This comes as a surprise because USP of all YU series was that they used run on the feature-rich Cyanogen OS, world's most popular after-market Android firmware developer.

In 2014, Micromax had even filed an injunction in Delhi High Court to ban the sale of rival OnePlus One in India, citing the company's exclusive deal with Cyanogen. [Note: OnePlus One was the first Cyanogen (official) OS based commercial phone]

Read more: OnePlus One Sale on Amazon Banned in India Over Micromax-Cyanogen Exclusive Agreement

There is no word on what went wrong with Micromax's YU and Cyanogen. The first sign of sour relations between the two surfaced when YU launched the budget phone Yunique with AOSP Android Lollipop in September.

Now, in the YU AOSP Android M project, the company is specifically mentioned it is 'NOT looking for CM ROMs'.

With the announcement, it looks like YU has ended ties with Cyanogen and henceforth will take the help of freelance ROM developers to build new updates for its phones.

YU is offering huge cash prizes up to Rs 5 lakh for the winner of the programme. [More information, HERE]