Image in email not showing on mobile but does show on desktop.

Image in email not showing on mobile but does show on desktop.

Hi Zoho,

I've created a campaign that has an image just under the first paragraph. 

When I send this campaign, the pictures shows on the desktop but doesn't show on mobile. I've also compressed the image so it's under 1mb and that still doesn't make it show. 

How do I make sure they always show on mobile?

Please see images attached for reference. This is two different mail providers. One gmail and the other zoho mail. 

Regards
Colin