I recently got a Nokia C2-01. Very basic thing that is used for calls and texts and doesn't need charging every half a day. It's also on Giffgaff in the UK so it costs me £20 top up a month for what I was paying around £80 a month for before. It is a weight lifted from my shoulders in many ways.
£20 on giffgaff? You must make a lot of calls to non-giffgaff users on the go. And how were you paying £80 before? The advantage of having a smartphone is that you can get by easily on something like their £10-12 plan simply by using data to make free skype/gtalk/SIP calls and everything else is unlimited anyway. Battery and general reliability wise, nothing beats a good old Nokia though!
£80 before: handset included and crap contract.