The performance of a mobile network is highly dependant on the location and number of users.
I get 40-75mbps solid with my Smarty connection where I use it the most. Overall though, if I go on the road I notice that 3 coverage is vastly inferior to that of O2.
Always pays to use a 1 quid SIM card before porting. Try before you port/buy.
VOXI is a Vodafone reseller that has unlimited for 35 per month, no contract. Perhaps try them out with a 5 quid SIM before porting etc.
If you only use or need 12GB a month then you could go with any provider really for next to nothing. Might as well stick with EE. If you need 100GB+ then the choices become a lot less.
Edited by deleted (Thu 29-Oct-20 11:04:05)