I'm looking to replace my battered Sony Ericsson T610 - possibly with a cheaper model like the Nokia 2600 (not interested in cameras or any on that mp3 player nonsense) One thing that has always surprised me is how slow mobile phones are (e.g. navigating the menus, browsing the phonebook, spellchecker in text messaging) - why is this? Is it because of the SIM card speed? I want a phone that is fast and responsive to my keypresses, not where it noticeably lags. Are all phones affected by this, and is there any way of sorting it?