Maybe this has been discussed, but i don't remember reading it. I've been clearing out my cache regularly to free up memory. But it never occurred to me to delete MMS messages. I just freed up 10 MB of internal memory by deleting MMS messages. I deleted entire threads, and in some cases, individual MMS messages (pictures and videos), because i didn't want to loose the whole thread. I know there are apps for deleting SMS messages, Delete Old Messages, AutoDeleteSMS, etc., but i have not found one for MMS.( If you know of one, please share). These messages will stay there and hog internal memory. So now this is one more thing i will do regularly to maintain my eris in tip top shape. Well worth it IMO.