Which mobile phone is the best phone for checking E-mail,text message..?

There are so many smartphones available in the Mobile market, But the Nokia Lumia 900 is the nice smart windows phone. It provide so many features such as e-mail, SMS, easily calling, long battery life, huge touch screen, etc. It runs on windows mango 7.5 OS and powered by dual core processor. It support so many applications such as Facebook, twitter, orkut, etc.