Top-up £20 with Tesco Mobile. On our Triple Credit tariff your £20 top-up turns into £60. Or on our Rocket Packs tariff your £20 turns into 40GB data, 5000 mins & 5000 texts, which last a month. We'll email your top-up voucher code within an hour - to activate it, call 4444 from your Tesco Mobile phone. To swap your tariff, call 282 from your Tesco Mobile phone or use our app. You can also top-up in our app, over the phone by calling 4444 free from your Tesco Mobile phone and at tescomobile.com/top-up. This voucher is non-refundable. Terms and conditions