when someone sends me an MMS or a group text, I receive individual texts with a "download" icon. When I click on "download" nothing happens. LG customers service said it might be related to apn or mms setting. I looked online, but there is no "apn" in the network menu and I'm not able to change the settings this way, like everyone recommends. I also tried to change the default message app, but nothing. Any idea on how to solve this? thank you