I got my Omnia yesterday after a month waiting due to stock shortage in South Africa. The Omnia was loaded with i900JCHH1 ROM/PHONE. The 3G connection was very bad with this version of phone/radio FW at my house, UMTS logo appears for a while and you see the bars start to drop every 2 seconds and it changes to EDGE.
I decided to flash it with official Singapore i900DXHJ1, and this phone FW improved my 3G reception as now it stays connected much longer than JCHH1.
To the more experienced Omnia users, which phone ROM you will recommend to me which you rekon is the best radio/phone module out there? How safe is it to flash a different country Radio FW to the PDA FW?