All K series phones after k750 has got flight mode.You don't have to take out your sim.When you start the phone it asks you to start in normal or flight mode.I bought K800i day before yesterday from UK.its camera is awesome and flash is compared to any digital camera.there is a small difference of it from k750i which I had been using for last 1 and half years.in k750 if you play music in speaker they don't sound much(I am talking abt the intensity)...but if you set as a ring tone or if you are just trying the ringtone volume then thats very intense.there was another case with fm radio.if you listening to the radio in speaker that sounds as intense as the ringtone volume.the case is different in k800i.whehther you listen to radio or listen to music in speaker they sound loud enough(obviously louder than k750i when you listen to music in speaker,but bit less than the k750 radio)but not louder as ringtone.when you listen as ringtone its equal to k750 ringtone.overall its better than k750 only with whe exception that k750 has magabass.But,if you increase the bass in your equalizer to max and listen to it in a headphone its 90% comparable to megabass.trust me i am the user of both and i also tried w550i,w810i and w710i.
one more thing i forgot....don't go for k810i.its keypad really sucks.its got only one advantage over k800 and thats usb 2.0
now i have one qn to the forum..can anybody tell me the price of k800 in india.I bought it in uk in 160£.so,i am trying to compare.