The iPhone 7+ has a 12 megapixel camera. Most field service firms do not want such high resolution photos uploaded and stored on their servers. Faststone has a great FREE photo resolution reducer for windows PCs. Check it out.
Batch Reduce Photo Resolution … Free Download
SOFIBlog.com ... 352-324-6042 Florida 
I use Faststone to add information on photos and resize them. I wouldn’t use anything else. just love the software and it is free!!!
Windows XP File Resizer Powertool: http://go.microsoft.com/fwlink/?LinkId=211477
Windows 7/8/10 File Resizer Powertool: http://www.bricelam.net/ImageResizer/
(right-click, resize)