For all the people having the problem with the mms not working displaying " no subject The media content was not included due to a picture resolution or message size restriction ". This are the setting to use for Cellular data apn i use internet2.voicestream.com for mms apn epc.tmobile.com username leave it blank password leave it blank mmsc http://mms.msg.eng.t-mobile/mms/wapenc mms proxy 216.155.165.050 mms max message size 614400 mms ua prof url http://wap.sonyericson.com/UAprof/W800iR101.xml this worked for me and i tried everything let me know leave a msg either way so i can check i hope this helps everyone i wasn't able to receive msg for a long time and i finally found this setting.
If that dosent work change the mms settings to apn wap..voicestream.com username leave it blank password leave it blank mmsc http://mms.msg.eng.t-mobile/mms/wapenc mms proxy 216.155.165.050 mms max message size 614400 mms ua prof url http://wap.sonyericson.com/UAprof/W800iR101.xml
Sorry i made a mistake sorry i was way to happy about finding this out apn wap.voicestream.com username leave it blank password leave it blank mmsc http://mms.msg.eng.t-mobile/mms/wapenc mms proxy 216.155.165.050 mms max message size 614400 mms ua prof url http://wap.sonyericson.com/UAprof/W800iR101.xml