The flag for Mauritania, which may show as the letters MR on some platforms. This design changed in August 2017, adding a red band at the top and bottom.
Only newer vendor updates display the new flag design.
The Flag: Mauritania emoji is a flag sequence combining ? Regional Indicator Symbol Letter M and ? Regional Indicator Symbol Letter R. These display as a single emoji on supported platforms.
Flag: Mauritania was added to Emoji 1.0 in 2015.
U+1F1F2
U+1F1F7
?? Regional indicator symbol letter m
?? Regional indicator symbol letter r