Here is the official ROM fro Doogee S70 Lite rugged phones below.
Latest version
Release date : 2018/9/13
File size : 1.36G
Download link: https://mega.nz/#!m351wY4Y!MyryE7doPpoIMjh-Ts_Jve65X1vFRdbPmTMpMNwqdm0
Wireless update:>>>>>>>>>>>>>>>>Go to settings > about phone > wireless update (update fail >> click HERE)
Update with SPflash tool:>>>>>>>>>>http://community.doogee.cc/forum.php?mod=viewthread&tid=2674
Errors you may meet and solutions:>>>https://community.doogee.cc/forum.php?mod=viewthread&tid=4271
Bugreport:>>>>>>>>>>>>>>>>>>>>>https://community.doogee.cc/forum.php?mod=forumdisplay&fid=117
How to catch a bug log:>>>>>>>>>>>>>http://community.doogee.cc/forum.php?mod=viewthread&tid=3511
Suggestions:>>>>>>>>>>>>>>>>>>>https://community.doogee.cc/forum.php?mod=forumdisplay&fid=45
Source: DOOGEE Froum