I just got my Lumia 800 about half a week ago. Here are some problems I faced.

#1: SIM telco codes take long to load and sometimes fail. I'm a Hotlink user so, *100# will bring up the EasyMenu. This takes about 30 seconds, provided it doesn't fail.

#2: Unable to reply those SIM telco codes. All I see is an OK button, without an option for me to key in any numbers. This means I can't change my activ10 or check my rewards or anything else for that matter.

#3: Short battery life. I get about 1 day's worth of battery for every charge. I only use wifi at home for whatsapp and a lil facebook.

#4: The end call button doesn't end the call. I faced this twice, and on both occasions, I had to restart my phone.

Anyone here has any solutions for the aforementioned problems? Thanks!

Thanks all for the prompt reply! I will update my firmware and see how it goes =)

K I updated the firmware and the battery was more or less the same, with an estimate time remaining of 18 hours with 100% battery. I did a hard reset and now the battery has an estimate of 1 hour and 13 hours remaining. Hmmmm.

I just updated to whatsapp 2.0.
It crashes every time I try to open it =(

Oh okay, got it fixed. Had to uninstall then install again =)