If you talk rather than text, look at Simplicity Tariffs, not this, quidco still applies though!
Perfect for textaholics & also I think, people with house in Spain! (Hear me out!)
£15 online tariff less vat reduction less £110 quidco = £10.11 over 24 months (plenty of phones to choose from, generally say "Free on all tariffs")
UK Picture/Video Messages and any type of message from europe are counted as 4 instead of 1 out of your bundle on O2, but this tariff has unlimited texts, so text away!
Add £4.90 a month Spain Bolt-on whenever you travel to receive FREE calls in Spain (up to 1000mins a month) and discounted rates calling from there! This bolt-on applies to any tariff, including simplicity!