I was with another operator who closed so had to find another SIM only provider. Smarty offer excellent coverage where I live and throughout the UK. Their SIM only plan offered more data than any other on a price comparison. The monthly tariff was excellent offering unlimited calls and txt, as well as Gb of data I selected. My calls in Europe while roaming are still included. Fast service, easy set up of account online and no issues to date. Would recommend Smarty for anyone looking for a SIM only tariff that has very good coverage of UK, agreed data, free unlimited calls and texts. Renews each month. Very happy customer!