If it is like on other phones, there are two separate contacts rows for each type, one on middle, and one on side, and you can even have the 2 sims cards at the same time as the micro SD, if you are ready to glue them together like in this hack : https://hackaday.com/2017/04/14/dual...m-slot-phones/ (title is misleading, as explained in the [update] part of the article)