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Best UK Networks for Data Rollover 2021

Data rollover is offered by several UK networks as a perk, but not all dta rollover services are equals. Check out below Half Cooked’s full comparison.


Latest Offer: 30GB £15 p/m!

Sky Mobile is offering 30GB of data for only £15/month right now. Plus, you can enjoy unlimited streaming on Sky apps without using your regular data allowance. Hurry up and get this deal before it’s gone!

We don’t think anyone enjoys losing their data at the end of the month. After all you’ve paid for it, so why should you lose it? Luckily, some networks in the UK are offering data rollover features and in this article, we’ll cover all of them.

What is Data Rollover?

What is Data Rollover? It’s a great feature offered by many mobile networks in the UK. Your unused data at the end of the month is automatically rolled over to the following month and the rolled-over data will be used first. Once you use up all your rolled over data, you’ll start using up your regular monthly allowance (Except Sky Mobile, where the data is kept in a piggybank for up to three years). For example, if your monthly data allowance is 4GB and you’ve only managed to use 2GB, the unused 2GB will be rolled over to the following month and you’ll have 6GB to use!

What Factors Do We Consider When Ranking the Networks?

We consider several factors including flexibility, availability (SIM Only, PAYG or both) and length of rollover period & also we consider it a big plus if you can share your rolled over data.



  • Money off your bill for any unused data on ‘data discount plans’.
  • No credit checks, 1 month plans, you may cancel anytime.
  • All plans include Unlimited Texts & Minutes.
  • Cheapest 1 month Unlimited Plan in the UK.
  • Now has Wi-Fi Calling.


  • No 5G.
  • No 4G Calling.
  • No handset plan options.

SMARTY is a low-cost virtual mobile network operator, powered by the Three Network. It’s approach is unique within the UK’s mobile market. The operator takes a customer’s unused data and applies a discount on their next month at a rate of £1 per GB. SMARTY even calculates your unused MBs, not GBs. Plus the network’s prices are already super competitive and they offer great value.

To benefit from this unique perk, you have to be on a data discount plan though. There are currently three ‘money back’ tariffs on SMARTY. You can check them out via the table below. We’d like to emphasize that there’s a £5 base cost on these discount plans.

All SMARTY tariffs come with unlimited minutes & texts.
NETWORKAvailable on PAYG?Available on Pay Monthly?Rollover Period
Not available.Yes, available on all Data Discount plans.Applies discount on your next month.

Sky Mobile


  • Allows you to keep your unused data for up to three years
  • You can switch between available plans
  • Unlimited Sky TV apps streaming, if you’re a Sky TV customer
  • 5G at no extra cost
  • WiFi Calling and 4G Calling


  • No unlimited data plans, or big data plans
  • Only 12-month contracts

Sky Mobile’s data rollover feature is simply called ‘Roll’ and at Half Cooked we rate it as one of the best. It’s a great scheme that applies to all Sky Mobile tariffs. If you’re on Sky Mobile, your unused data will be automatically rolled into your Sky Piggybank each month, and you can use them or share them with your family/group members whenever you want for up to three years. This is an outstanding offer and no other network comes close to offering a data rollover feature like this.

On top of that, if you start building up a lot of unused data which you don’t expect to use, you can use them to purchase handsets, tablets & other accessories. However, you’ll have to collect a ton of reward points to be able to get a decent discount.

Sky Mobile is powered by the UK’s second largest operator, the O2 Network. It also comes with some great perks, including unlimited streaming on all Sky apps on your mobile device. Read our extensive Sky Mobile review to learn more about the network!

NETWORKAvailable on PAYG?Available on Pay Monthly?Rollover Period
Not available.Yes, available on all plans.Up to 3 years!

Virgin Mobile


  • The best 4G network coverage and fastest data speeds thanks to EE
  • 5G coverage from Vodafone
  • WiFi Calling and 4G Calling on all plans
  • A second chance to use your leftover data
  • Free access to 3.5 million Virgin WiFi hotspots
  • Wide variety of SIM only deals to choose from


  • No PAYG deals
  • No short-term contracts
  • All plans require a credit check
  • Strict restrictions when roaming abroad
  • A little pricier than its competitors

Virgin Mobile were one of the first mobile networks in the UK to offer a data rollover scheme, and the network’s scheme applies to both SIM Only tariffs and pay monthly phone contracts.

On Virgin Mobile you won’t lose your unused data you’ve paid for at the end of a month, when your allowance refreshes. Instead, the network will let you use it the following month. There’s no limit to the amount of data you can carry over, however, you can’t carry any data that is linked to a short term promotion. Another good thing about Virgin’s data rollover is even if you change plans, you still get to keep your rolled over data. The operator also rounds up your data when calculating, so if you have 23MB data left, you will be rolling over 25MB.

Virgin Mobile is powered by the EE Network. To see what other features the network offers, make sure to read our extensive Virgin Mobile review.

NETWORKAvailable on PAYG?Available on Pay Monthly?Rollover Period
virgin logoNot available.Yes, available on all plans.1 month.

iD Mobile


  • Wide variety of SIM deals to choose from
  • WiFi Calling & 4G Calling on contract deals
  • Data Rollover
  • 5G at no extra cost
  • Competitively priced SIM deals


  • PAYG plans don’t have WiFi or 4G Calling
  • No fancy rewards or loyalty offers
  • No 2G coverage

iD Mobile’s data rollover scheme includes both phone contracts and pay monthly plans, however, pay as you go deals are excluded. The feature is a traditional one as it rolls over unused monthly data to the next month, giving iD Mobile customers a second chance to use their data.

Given how iD Mobile has the cheapest SIM only contract in the UK at £3.99 -and also other competitively priced deals- Half Cooked rates the network’s data rollover scheme higher than most others. You can check the iD Mobile app to find out how much rolled over/regular data you have left at any time.

iD Mobile piggybacks off the Three Network. If you wish to discover more about the operator, we’d strongly recommend you to read our detailed iD Mobile review.

NETWORKAvailable on PAYG?Available on Pay Monthly?Rollover Period
Not available.Yes, available on all plans.1 month.



  • Great rewards with VeryMe
  • Entertainment subscriptions bundled with premium plans
  • Great roaming perks
  • A wide variety of SIM deals to choose from
  • 5G coverage in the UK and the EU


  • Ranked as the worst 5G network by Opensignal and OOKLA in the UK
  • Generally, more expensive plans
  • Some almost-essential perks are only available on premium plans

Just like many other mobile networks, Vodafone’s data rollover feature is exclusive to PAYG customers (Big Value Bundles). Vodafone calls this feature ‘Total Rollover’, but it’s no different than your traditional data rollover perk. It moves your unused texts, minutes and data from your current month’s bundle to the following month’s. Your unused allowances only roll over on a monthly basis and if you change to a different Big Value Bundle your rolled over data will reset.

There aren’t any exceptions when it comes to pay monthly plans. They are completely off the table and don’t get to benefit from this feature.

Vodafone offers many other perks and features, and if you wish to learn more about the network we’d recommend you to read our extensive Vodafone review.

NETWORKAvailable on PAYG?Available on Pay Monthly?Rollover Period
Yes, available for PAYG and Flex plans.Not available.1 month.



  • Best 4G coverage & competitive 5G coverage in the UK
  • Fastest 4G and 5G data speeds
  • Wide range of SIM only deals
  • Wide range of phone deals
  • Decent rewards and long trials for valuable add-ons


  • Significantly costlier than competitors
  • Not the best for international roaming or calling
  • No 5G coverage on contract-free plans

Being the UK’s largest and fastest mobile network with many features & benefits, it would be unusual for the EE Network to not offer any data rollover feature. If you’re using an EE PAYG Pack or a Flex Plan your leftover data will be added to the next month. You are given seven days to renew your plan if you want your leftover data to roll to the next month.

EE’s pay monthly customers are not allowed to roll their unused data, as this feature is exclusive to PAYG and Flex customers. The network will not allow you to roll over data from add-ons or Free Boosts. Packs must have a data allowance of 100MB or more to be eligible for this feature.

Alongside the best data speeds, EE also has the best network coverage in the UK. If you’re interested in joining the network, make sure to read our extensive EE review first!

NETWORKAvailable on PAYG?Available on Pay Monthly?Rollover Period
Yes, available for PAYG and Flex plans.Not available.1 month.



  • Decent 5G coverage and data speeds
  • Build your own phone contract
  • Thousands of free WiFi hotspots
  • O2 Priority deals and discounts
  • A decent range of handset options
  • 6 months free Disney+, Amazon Prime Video, or more


  • Most tariffs are pricier than competitors
  • The slowest 4G internet speeds in the UK
  • Not the best 4G coverage

Data rollover is exclusive to O2 Mobile’s pay as you go deals, also known as Big Bundles and UK & International Bundles. Any data you haven’t used will be rolled over to the next month, as long as you continue to renew your data package. Each Big Bundle (excluding £5) includes data rollover of up to how much data they initially offer. Simply put, if you’re on a 6GB data bundle that’s also the limit for the amount of data you may roll per month. The same applies to UK & International Bundles.

O2 is slightly limited when it comes to data rollover. For example; if you decide to change your bundle, your data rollover will reset. You also need to make sure you renew your plan on the day it expires or else your rolled over data will be gone. However, your rolled over data doesn’t expire at the end of the next month so that’s a big plus for O2.

If you wish to discover what other perks come with joining O2, you may want to read our detailed O2 review!

NETWORKAvailable on PAYG?Available on Pay Monthly?Rollover Period
Yes, available for PAYG.Not available.Multiple months with data cap.

Which Networks Don’t Have Data Rollover

The missing mobile networks from the list above don’t offer any data rollover options. Three Network and BT Mobile are the two eye catchers, as they are major players on the UK’s mobile market. Smaller mobile virtual network operators like Tesco MobilegiffgaffVOXI and Plusnet Mobile also don’t offer any data rollover schemes.

Although they don’t offer this feature, each of these networks have their own unique perks which are worth checking out. If you wish to check them out, just click or tap on their logo below.

Half Cooked’s Overall Winner

While we highly rate Sky Mobile’s up to 3 years data rollover scheme, we believe SMARTY’s unique money back offer is a little bit better. This way you never overpay for data and you get significant discounts.

On top of that, SMARTY already offers super competitive deals.