i just upgraded my x10 to the new 2.1 firmware yesterday using the nordic firmware mod. and today i'm going back to 1.6 firmware. not impress at all !! anyway, the first problem i'm having is all the mobile network settings disappeared when i activate/deactivate the airplane mode. the second problem i have is the picture in the text messaging is horrible. i send a picture from my wife's iphone to my newly updated 2.1 x10 and the picture in the text message was horrible. is it soo blurry and pixilated. before i updated to the 2.1 firmware i was able to receive pictures from her phone very clear. i also could not get the automatic network settings on this new 2.1 firmware, so i have to manually enter all the mobile network settings to get the mobile internet to work and multimedia messaging to work, and it sucks when it disappeared whenever airplane mode is activated. i have to reentered everything back in again. perhaps its because it's a nordic combined (b) firmware. the new hspda, the "H" thing that replaces the "3G" symbol, does make a difference in internet surfing. it is fast compared to 3g. for now i will stick with 1.6 to get my day going smoothly.