You can email the pictures from your phone to your laptop or whatever computer you use, save them to your desktop, where you can find them, and use Irfanview to resize them before you post them here.
Irfanview is a free program you can download off the internet. When I flew as an Aerial Photographer for the Civil Air Patrol, I used Irfanview to resize the pictures and clear up haze and then used another program called Robo Geo to geo tag them (metadata) before uploading them to FEMA and GOSHEP.
Mike