Smarty is a Mobile Virtual Network Operator (MVNO) which uses Three's mobile network provide its mobile coverage. It's also owned and operated by Three.In our most recent customer service poll, Smarty scored 7.4/10 based on 105 votes.
Smarty doesn't carry out credit checks when you apply for one of its one-month rolling Sims.
The cheapest Smarty Sim costs £5/month and it currently offers unlimited minutes & texts and 4GB/month data. It's a one-month contract so you can cancel anytime. See cheap Smarty Sims.
Yes, you can keep your old mobile phone number. If you're moving from another network, you'll need to text 'PAC' for free to 65075 to request your PAC (porting authorisation code). You will need to provide this to Smarty which should move your number over within one working day.
You can use your UK allowances throughout the EU on all Smarty plans.
Yes, Smarty offers 5G on all of its plans. However, be aware you'll need a 5G-compatible phone too.