Here is GoMobile mybb theme, the same theme Jdtrendz is using.
To upload it follow the below steps:
Login to your mybb admin control panel,
Go to Themes,
Click On Import Theme,
Select to your file manager,
Open this theme and select the .xml file inside and upload,
Tick to version check and upload,
Then go to your theme and click on the arrow next to the new theme you upload.
Check out your site to see the beauty of the theme, then start your customizing.
Do you have any questions, or problems?
Drop a reply and tag @Sirlegendy