<Tr> <Th> Form factor </Th> <Td> Slate </Td> </Tr> <Tr> <Th> </Th> <Td> 137.5 mm (5.41 in) H 71.2 mm (2.80 in) W 7.18 mm (0.283 in) D (Droid Ultra) 8.5 mm (0.33 in) D (Droid Maxx) </Td> </Tr> <Tr> <Th> Weight </Th> <Td> 137 g (4.8 oz) (Ultra) 167 g (5.9 oz) (Maxx) </Td> </Tr> <Tr> <Th> Operating system </Th> <Td> Android 4.4. 4 KitKat </Td> </Tr>

How do i know what model of droid maxx i have