ZTE-owned company: nubia is going to announce a wearable smartphone device at the MWC this year. There was a teaser poster released a couple of days ago but the new invite was sent directly to press and includes a specific time. The event will be held at the Fira Gran Via, Barcelona and will begin at 6PM local time (12PM EST time). The event's tagine is "Flex your Life" referencing a device with a flexible display. It wasn't initially clear what kind of flexible device we could expect, but the graphic on the official invitation resembles the shape of a display we saw in the teaser...
Source: https://www.gsmarena.com/nubia_mwc_event_invites_go_out_for_a_flexible_product_announcement-news-35510.php