According to Wikipedia[1], "300 kB is the current recommended size used by networks due to some limitations on the WAP gateway side". While that is listed as "

According to Wikipedia[1], "300 kB is the current recommended size used by networks due to some limitations on the WAP gateway side". While that is listed as "Citation Needed", other links from the the same search query lists sizes varying from 600KB to 1.2MB. A quick look at the files sizes at the images I've taken shows that most of my images are over 1000KB. So, there is some kind of re-sizing that needs to occur over SMS. Instagram and other similar services don't necessarily require such re-sizing, or possibly get around it by having you crop the image yourself, so the relative quality of the remaining portion remains higher quality as opposed to shrinking the entire image to fit the size restrictions. [1]http://en.wikipedia.org/wiki/Multimedia_Messaging_Service#Challenges http://en.wikipedia.org/wiki/Multimedia_Messaging_Service#Ch...