Glad someone bought this up...
When I joined Mercury in 1995 I bought an Ericsson PH337 along with my Bronze contract. In 2005 I was told I was eligible for a free upgrade as I had not previously requested one - and they reccomended a Motorola (folded in half). I gave it my best shot, but it seemed filled with needless features that are implemented to boost the 'phone company's revenue rather than help the user. Downloadable ringtones (£3 a pop), picture messages (why???) and a devious text 'feature' that allows you to go one or two letters over the one text limit, doesn't tell you, and then charges you for TWO texts

!
Add to this list: Fiddly buttons, over complex menu, irritating ringtones, clumsy folding design and cheap, creaky build and you can see why I sold it in under two weeks on *Bay

.
The PH337 has an alloy chassis, resonsive buttons, easy text and good sound (thanks to B&O earpiece and mike) along with bombproof software and I now use this again as my main 'phone. People have a laugh - sure "look at that old brick" they say, but the amount of flimsy silver phones they get through while the old skool blowers are still chugging on without a problem tells the real story.
I see no reason to believe that my PH337 will not be still working in 2015...
To sum up - don't throw out your old 'phone when you upgrade - you may be glad you diddn't (I was).
Ian