smartphone, plenty of choices, can pick up a cheap hp 514 for about 160 quid sim free.
Its no iphone and has no touchscreen but is worth considering if you want it as cheap as possible
specs
Integrated wireless•Smartphone with 12-function keys•Integrated Quad band GSM/GPRS/EDGE wireless radio with automatic band transition•Integrated WiFi - 802.11 b/g with WPA2 security•Integrated Bluetooth® v1.2 wireless technology•Pocket versions of Microsoft software are included (Outlook Mobile, Office Mobile and Internet Explorer for Smartphone)•Integrated camera Integrated HP Photosmart Camera 1.3 Megapixel, 1280 x 1024 SXGA resolution•Operating system: Windows Mobile® 6.Standard•Processor: TI OMAP 850 200 MHz processor•Display: 2.0" Micro-reflective TFT, 176x220 pixel color with LED backlight•Memory
- 64MB RAM
- 128 MB ROM•Dimensions: 107mm x 48.6mm x 16.3mm•Power:
- Removable/Rechargeable 1100 mAh Lithium-lon user changeable battery
- Talk time: up to 6.5 hours
- Standby time: up to 7.8 days (188 hours)•Other interfaces:
- USB 1.1 Client
- microSD Slot supports 4-bit microSD memory standard•Audio:
- Integrated microphone
- Receiver
- Speaker
- 1 x 2.5 mm stereo headphone jack, stereo (through headphone jack)•HP exclusive applications:
- HP iPAQ DataConnect: to automatically configure your device for operator network settings
- HP iPAQ Shortcuts
- VoiceReply to emails
- Cyberon Voice Command
- MMS Composer
- JVM (MIDP 2.0, CIDC 1.1)
<> - UMA Client (optional)•Weight, metric 102 g