Hi there, do you guys know if there's any explanation to this? I'm not able to send MMS, when trying to send a picture or video (that's what I've tried) it always displays "unable to send".
Use this site to find your country and carrier then use the values they provide: World Wide Mobile Phone Settings Or check the help pages at your Carrier's website.
W10M: Settings > Network & Wireless > Cellular & SIM > SIM settings > Add an MMS APN > enter the values > make sure the "Apply this profile" box is checked > tap Save.