Says the Nokia 3510 owner?
I used to have a 3510i.
Now I have two phones in fact, my friends have the other number and my relatives and other, more 'official' contacts (such as public offices) have the other. I also give the latter number when I'm applying for a job. That way I know what type of a call I'm expecting when my phone rings.
First one is a
Nokia 2730 Classic. Everything I need from a phone, simple interface, 2mpix camera in case I absolutely need to take a picture of something, mp3 player and 1gig mini-SD slot.
Second one is a
Nokia 6230i. It's an older model, from 2005 in fact, but it's a reliable phone, has simple interface, and does what it's intended to do.
Another bonus with the two-phone system is that I have prepaid contracts in both phones. That means I'm saving money because I don't have any monthly fees or data plans. It also means that my number is impossible to find unless I've given it out myself, so I know exactly who has my number and therefore eliminate the telemarketers and such.
I bought the 2730 3 years ago, paid 70€ for it. The other one I got for free. My monthly prepaid costs are maybe 5-10€ at most.
So yeah, it's a great way to save money.