Convert otb to sk2

What is the difference between .otb and .sk2?

Description: The OTB (Nokia Over The Air Bitmap Image) file format is a type of image file developed for use on Nokia mobile devices. These files are specifically optimized for efficient transmission and display on Nokia phones, particularly older models. The OTB format is designed to be compact to facilitate over-the-air (OTA) transmission, which was an essential feature in the era of limited bandwidth and data transfer capabilities. The format supports monochrome graphics, making it suitable for simple images like icons and logos.; The sk2 file type is a vector graphic format created by the sK1 open source vector graphics editor. It is an extension of the sk1 format and is used to store vector graphics and images. The sk2 file format supports layers, masking, transparency, and other advanced features.