Using Images
Images can be used as a way to break up text or attempt to get a point across. When using images on a mobile website, it's best to limit them. The reason for this is when you include a lot of images in a page of your content, it ends up hurting your analytics and that means you get less traffic when a viewer is reading it on their mobile device.
Usually, mobile phones take time to load heavy images. So if you decide to put images on your site, it's best to use one or two and place them where they are relevant in a contextual sense. Formats for light weight images are those in the .jpeg, .gif, or .png format. Also, in order to avoid zooming, make sure your images are compressed.
One more thing to note is that even though all current devices display images, some users may prefer to browse with the images turned off. So it's recommended to use alternative text for this.
Thanks!
Most people have a smart phone or ipad... that is, most people except me! So, to see what a website looks like on a cell phne or ipad, I use the following website: mobilephoneemulator.com
I use this website because I make mobile friendly websites for many local businesses and that's the only way for me to see what I've made for them.