Currently I use NOKIA 2690.But I love to get SAMSUNG GALAXY ACE in future.Am making savings for that.Hope i'll get it soon.
iPhone 4, I've been using iPhone for almost 3 years now and don't think I could go back to another brand. I've been massively stung with really bad phones from LG, Samsung and Motorola before and I'm not a fan of any of the new Android handsets personally. Nokia used to do brilliant long lasting handsets but they've not had anything really innovative in years, my partner also has a Nokia supplied by his work and it's started breaking (the back falls off all the time and the battery is slightly dodgy) after only six months gentle use.
Oh and after working for a mobile phone provider I wouldn't recommend the Sony Ericsson Xperia or any variation of it, way too many complaints and problems with them. I guess the Samsung Galaxy is the closest touch screen option but even though it's lighter I just find the screen ridiculously big!