[Desperate!] Mat not right on mobile - fine in engine previewer?

Development Rendering
1

This is how the mat appears in the mobile previewer (identical on Mac and PC):

HighresScreenshot00009.jpg
HighresScreenshot00009.jpg2048×1536 786 KB

This is how it appears on a mobile device (IOS 8 iPhone 5, IOS 7 iPad 4. Both Engine versions 4.4 and 4.5 do the same thing):

IMG_2841.PNG
IMG_2841.PNG1136×640 254 KB

Anyone know what the problem might be?

here’s my material:

Untitled.jpg
Untitled.jpg1258×686 210 KB

Thanks for reading!

2

Turns out there was no mipmaps on the texture… taking the original file, scaling it into a 1024x1024 texture and re-importing fixed it!