How many time do I have to repeat this: 3 is only 3G 2100MHz.
They ditched the Orange 2G in September 2010 as they were paying £80m which affected £8m of custom, so if they lost all of the customers they would still save £72m a year, Probably why they have made a profit the last 2 years.
If you can get a converter to a standard aerial fitting try an old UHF aerial.
A 2100MHz 12 db gain aerial is on eBay for about £15 from China.
nb it might say newbie, Been building PCs since 386SX25 late 80's
My network is VM 30 (soon to be 60) VMDG 480 Gigabit router 2 x cat5e cables to work room, one for gigabit to 8 port switch, second N WiFi router in dual channel mode 300 mbit/sec & other devices, the other for 10/100 to 16 port switch (runs at 200mbit according to the spec sheet) Printer etc.