The handphone should have a good battery back up.
Should receive good signals.
Should be rugged.
Should be good looking.
Should be cost effective.
I am using both Nokia 5110 and 3330.
In Nokia 3330 writing messages could be the fastest due to various options including the dictionary.Typing characters is the fastest comparable to typing higher grade since you dont have to wait for characters to appear on the screen.
Decide what you need and decide than going by ads.Keep your mind open and understand the products features and benefits including the price tag!
Recommend 3330 for sleek and light and advanced usage preferences.
Recommend 5110i for heavy callers and rough and rugged users.
5110i is most cost effective!