How to force a factory reset or hard reset on Doogee devices

Doogee F3 Pro Doogee F3 Pro
Doogee X5 Doogee X5
Doogee X5 Pro Doogee X5 Pro
Doogee F5 Doogee F5
Doogee X6 Doogee X6
Doogee X5S Doogee X5S
Doogee Valencia 2 Y100 Plus Doogee Valencia 2 Y100 Plus
Doogee Y200 Doogee Y200
Doogee T6 Doogee T6
Doogee Y300 Doogee Y300
Doogee X6 Pro Doogee X6 Pro
Doogee DG320 Doogee DG320
Doogee X3 Doogee X3
Doogee F7 Doogee F7
Doogee F7 Pro Doogee F7 Pro
Doogee X5 Max Doogee X5 Max
Doogee T6 Pro Doogee T6 Pro
Doogee T3 Doogee T3
Doogee X5 Max Pro Doogee X5 Max Pro
Doogee T5 Doogee T5