hi lyt forumers, recently i apply for u-mobile data only plan but when i insert the sim card into the mobilephone,which is a Nokia 6680 (3g) it display "sim card registration failed". Currently i am using a Nokia 6680 3g mobilephone as a modem for Celcom D68 data only plan which is working well, so i am confused as to why one telco provider wireless broadband is working whereas the other one isn't. The staff at the Berjaya Time Square u-mobile booth was not helpful at all, each tell a different story, even called their service center and she said their "data only package"can only be use with hsdpa phones, could anyone confirm on this.... Please can anyone confirm whether the Nokia 6220c (with 3g,hsdpa) mobilephone can be use as a modem for u-mobile "data only package" plan (currently for RM58.00 until end Dec. 2008) or is this "data only package" to be use strictly on hsdpa modem, are they no other options besides using hsdpa modems? Any help would greatly appreciated...Thank You Cheers!!