The Mudita Pure does not have a specific limit of the number of saved contacts. The only limiting factor is the phone's memory storage size. The Pure is equipped with 16 GB eMMC flash storage, of which about 12GB is available for the user.

Plenty of Storage for Contacts

Considering the small amount of memory that each contact uses, the phone's contact capacity can be estimated to be in the tens of thousands. The maximum number of contacts depends on how much of the phone's memory is used for other things (like audio files for example).