Oppo F-series of smartphones is the latest mid-range lineup from Oppo, which currently has only one member and that is the F1 handset. The company has just announced that it has plans to release an upgraded version of the F1 phone in April, called Oppo F1 Plus.

The handset will pack a bigger 5.5-inch display with Full HD resolution and 4 GB of RAM, compared to a 5-inch HD display and 3 GB of RAM on the F1.

However, the company also released another teaser that says "Wow the world, Oppo's breakthrough tech, MWC media event." There is no word what we could see, but some reports are suggesting that a high-end flagship smartphone is in the works. I guess we'll have to wait MWC 2016.