Useful output. Interesting it saw a 3 network GPRS. Are you in a very very rural area? Interesting no signal strength on Three 3G (UMTS) as well. The dongle is quite old as it calls EE by its old network name of T-mobile UK.
So from that you should have more luck with O2 and Voda on at least 3G
21 years of broadband connectivity since 1999 trial - Live BQM