I've had a problem for a couple of weeks now with MMS messages being incredibly slow. Sending a 2MB picture to someone can take upwards of 5 minutes, and sending a group message with no picture can take longer than a minute. My APN settings are configured properly according to Mint's guide. I'm on a Pixel 2 XL, latest security update. I use the default Messages app from Google. It's driving me crazy, any help would be greatly appreciated.