Well I m on Floyo 0.15 and had some issues with MMS sending/receiving.On stock 2.1 SE ROM when you have Mobile Data OFF,our X8s still automatically use GPRS to handle mms messages.On Floyo and other ROMS you need to turn it ON which may result in additional charges from your carrier if you don't use a prepaid internet data plan. So what do you do in this case you may ask! Well if you only use WIFI for internet and still wanna use MMS you should customize APN Settings. First google you carrier's APN settings for MMS and set it up manually.Be carefull to not use capital letters on some fields! Then delete every other APN settings leaving Mobile Data ON all the time and Reboot! This way you can MMS technology without any fear of additional internet charges. ;-) APN Settings can be found in WIRELESS ->MOBILE NETWORKS->APN menu in any custom ROM! Hope I helped someone here! Cheers and enjoy your phones! N.