Black Friday Deals for Existing Customers 2026

Last updated: Wednesday 11 November 2026
By: Switch Editorial Team, Switch Squid Ltd

Most Black Friday mobile deals for existing customers sit inside your account app, not on a public sale page. As of 11 November 2026, Vodafone’s 120GB SIM upgrade is £14 a month on 12 months, or £65.50 in the first year after £120 cashback if you claim it. If you are leaving your network, Lebara’s 30GB plan is £3.20 a month for six months, then £8, which is £67.20 in the first year through our link. SMARTY’s 50GB Affiliate Special is £8 a month through our link, or £96 over 12 months. This SwitchSquid guide explains how to check your own network first, which prices are only in an app, and which switcher plans are in the boxes below. If you buy through the deal boxes on this page, we may earn a commission. It does not change the price you pay.

Sources: giffgaff’s 18-month SIM plans and giffgaff’s homepage offer terms; Sky Group’s Black Friday 2026 announcement; EE’s Black Friday mobile page and EE’s Black Friday page; SMARTY’s SIM only plans; Lebara’s 30GB Exclusive Monthly Plan page; Vodafone’s published April airtime rise of £2.50; and Ofcom’s guide to switching mobile provider, all as of 11 November 2026.

How Black Friday deals for existing customers actually work

The big networks rarely put their best existing-customer prices on a page anyone can open. EE, O2, Three, Sky and Vodafone all keep most retention and upgrade offers behind a login, usually in the My EE, My O2, My3, My Sky or My Vodafone app. That is why a public “Black Friday” landing can look thin even when your own account holds a better price.

There is a second group of offers: plans for people who are willing to leave. Those are ordinary new-customer deals, and they are the leave-and-switch plans with a link on this page. They are not a discount on your current contract. You keep your number with a PAC or STAC code, and Ofcom’s rules mean the switch should complete within one working day.

A useful habit in November is to do both jobs on the same day. Open your account app first and ask what you can have if you stay. Then compare that figure with a one-year cost on a plan you could move to, including any cashback you have to claim, any April rise, and any price step-up after a cheap introductory period.

Vodafone: a 120GB upgrade for existing customers

If you are already with Vodafone and you are in an upgrade window, Mobiles.co.uk still shows a 120GB 5G upgrade at £14 a month on a 12-month plan, with £120 cashback by redemption, as of 11 November 2026. Vodafone’s published April rise on pay-monthly airtime and data plans is £2.50, so this plan moves to £16.50 from 1 April 2027.

The first-year cost is a full sum, not a headline monthly figure. Five months at £14, from a November join through March, plus seven months at £16.50 from April to October, is £185.50 before cashback. Take off the £120 cashback if you claim it on time with your bills, and the first year is £65.50, or £5.46 a month on average. Miss the claim and you pay the full £185.50.

The same range also has a 70GB upgrade at £12 a month with £96 cashback, which also comes to £65.50 in the first year after cashback, and a 200GB upgrade at £16 a month with £132 cashback, which comes to £77.50. The 120GB plan is the one in the first box because it is the best data allowance at that £65.50 first-year figure. You need to be an existing Vodafone customer who can upgrade, a credit check applies, and speeds on this plan are capped at 100Mbps. Check your upgrade date in My Vodafone before you order. Our longer walkthrough is in Vodafone SIM only deals for existing customers.

Vodafone’s own public Black Friday page does not currently set out 2026 SIM prices, so the upgrade figures above are the ones in the first box.

Sky VIP, EE, O2 and Three: check the app first

Sky is the clearest example of an in-account Black Friday offer. In its 5 November 2026 announcement, Sky Group set existing-customer Sky VIP mobile plans at 10GB for £5 a month, 50GB for £10 a month and unlimited data for £14 a month, or unlimited data for £10 a month if you are a Sky VIP Diamond customer who has been with Sky for more than 15 years. Those mobile offers run from 5 November to 2 December 2026. Those Sky VIP prices are in the VIP section of the My Sky app. If you are with Sky Mobile, open the app before you compare a switch. Our stay-or-move guide is Sky Mobile SIM only deals for existing customers.

EE’s public Black Friday mobile page still says its mobile sale is coming soon, as of 11 November 2026. EE also says some Black Friday offers will be available to existing customers, depending on the product and the offer, and that you can see upgrade options in the EE app or by calling 150 from an EE phone. EE has not published an existing-customer Black Friday mobile price yet, so check the EE app for any upgrade offer. See EE SIM only deals for existing customers for how EE’s March rises work and what to ask for.

O2 and Three have not published a public Black Friday deals page today. That does not mean your account is empty. O2 customers should look in My O2, including any Exclusive Deals or upgrade path, and remember the £2.50 April rise on voice airtime plans. Three customers should look in the Three app for customer-only SIMs and upgrade offers, and should expect April rises on many Three plans. More detail is in our O2 existing-customer SIM guide and Three existing-customer SIM guide.

giffgaff: a Black Friday data boost, including for existing members

As of 11 November 2026, giffgaff’s 18-month SIM plans include a Black Friday data boost on two contracts, with no mid-contract price rises on that range. The £8 plan is 40GB (was 6GB) for £8 a month. Twelve months at £8 is £96 in the first year, and the full 18 months cost £144. The £12 plan is 200GB (50GB plus 150GB extra) for £12 a month. Twelve months at £12 is £144 in the first year, and the full 18 months cost £216. After those 18 months the £12 plan returns to 50GB a month, according to giffgaff’s homepage terms.

giffgaff says you need to activate the £12 offer by 7 December 2026, with eligibility criteria, terms and exclusions. Existing members opt in via the giffgaff app, and the 200GB plan is also on giffgaff’s contract page. The 40GB plan (was 6GB) is still £8 a month today; our giffgaff review covers that 18-month range in more depth. Both plans need an 18-month commitment, which is a different kind of decision from a 30-day rolling SIM.

If you decide to leave: Lebara and SMARTY compared

If your in-account offer is weak, or you are out of contract and want a clean break, the two switcher plans in the boxes are the leave-and-switch plans with a link on this page, as of 11 November 2026.

Lebara’s 30GB Black Friday plan is £3.20 a month for the first six months, then £8 a month, through our link, on a 30-day rolling SIM with unlimited UK calls and texts and no credit check. Six months at £3.20 and six months at £8 is £67.20 in the first year. As of 11 November 2026, lebara.co.uk shows the 30GB Exclusive Monthly Plan at the standard £8 a month, so confirm the discounted price in the basket before you pay. The plan is for new Lebara customers, and it runs on Vodafone’s network, so check coverage at your address. Our fuller write-up is Lebara Black Friday SIM deal.

SMARTY’s 50GB Affiliate Special is £8 a month through our link, on a one-month rolling plan, with unlimited UK calls and texts and no annual price rises. Twelve months at £8 is £96 in the first year if you renew on the same plan. It is for new SMARTY customers who order through our link and activate within 14 days, and you should confirm 50GB and £8 in the basket, because SMARTY’s own public shop, as of 11 November 2026, shows 16GB for £8. SMARTY uses Three’s network. See SMARTY Black Friday 2026 for the wider plan range.

What you pay in the first year

The table uses first-year cash, not just the first month, because cashback, April rises and six-month introductory prices change the true bill. Figures are as of 11 November 2026.

Should you stay or switch?

Stay and use an in-account offer if your coverage is good, you are still tied into a contract with a high exit fee, or your network has put a clear Black Friday price in your app that beats the first-year figures above. Sky VIP at £10 or £14 for 50GB or unlimited is the obvious example, and giffgaff members should try the app opt-in on the £12 200GB boost before they move.

Switch if you are out of contract, your app offer is no better than your current bill, or you want a rolling plan you can leave. Lebara at £67.20 in the first year is the cheaper first-year cash figure of the two switcher boxes, but only if Vodafone coverage works at your address and you are happy for the price to step up to £8 after six months. SMARTY at £96 costs more over 12 months, yet it stays at £8, has no annual rise, and uses Three’s network, which is the better fit if you already know Three works in your home.

Do not assume a new-customer poster price is yours if you already have an account with that brand. Existing EE, O2, Three, Sky, Vodafone, SMARTY, Lebara and giffgaff customers are often asked to use an upgrade, recontract or app path instead.

How to switch and keep your number

Text PAC to 65075 from the phone you want to keep, or use your current provider’s app or website. Give that code to your new provider when you order, or in your new account if you are asked to complete the transfer after the SIM arrives. Ofcom’s switching rules mean the number should move within one working day once the code is used. Your old service is then cancelled, so do not cancel first or you can lose the number. If you only want to change plan inside the same network, you usually will not need a PAC code at all.

Make sure the phone is unlocked if you are leaving a network that supplied it. Most recent handsets are sold unlocked, but a locked phone will not take a new SIM until the old network has unlocked it.

Fit summary

This page is a good starting point if you already have a UK mobile contract and you want a calm Black Friday comparison: check your app, then look at a first-year cost if you leave. It is a weaker fit if you are a brand-new customer with no account to upgrade, or if you need a handset deal rather than a SIM. Phone-contract offers are a different comparison.

Important conditions

• Vodafone upgrade prices and cashback are for existing Vodafone customers who can upgrade. Cashback is paid by redemption against bills, not as a lower checkout total.

• Lebara’s £3.20 price is for new Lebara customers, through our link, and steps up after six months. As of 11 November 2026, lebara.co.uk shows the 30GB Exclusive Monthly Plan at £8 a month, so confirm the discounted price in the basket.

• SMARTY’s £8 50GB price is an Affiliate Special for new SMARTY customers, through our link; always confirm the allowance and price in the basket. SMARTY’s public shop shows 16GB for £8.

• giffgaff’s 200GB £12 boost needs activation by 7 December 2026. Existing members opt in via the app.

• Sky VIP mobile prices come from Sky Group’s 5 November 2026 announcement and are found in the My Sky app.

• Coverage, credit checks, fair-use policies and April rises vary by network. Check your postcode and the terms in the basket before you pay.

FAQ

Are there Black Friday deals for existing mobile customers?

Yes, but most of them sit in your account app. As of 11 November 2026, Sky has published Sky VIP mobile prices for existing customers, giffgaff lets existing members opt into a 200GB £12 boost via its app, and Vodafone customers who can upgrade can take a 120GB plan at £14 a month with £120 cashback through the first box on this page. EE’s public mobile sale is still described as coming soon, so check the EE app as well.

What is the cheapest existing-customer deal today?

As of 11 November 2026, Vodafone’s 120GB upgrade is £14 a month on 12 months. After £120 cashback, the first year is £65.50 if you claim it on time, which is £5.46 a month on average. That is only for existing Vodafone customers who can upgrade. If you are leaving your network, Lebara’s 30GB plan is £67.20 in the first year through our link, but that is a new-customer Lebara offer, not a retention deal.

Can I get my network’s new-customer Black Friday price if I already have an account?

Usually not automatically. Existing customers are typically asked to use an upgrade, recontract or in-app offer instead of the public new-customer plan. Check your app first. If the in-account price is poor and you are free to leave, you can switch to a new-customer plan on another brand and keep your number.

Does Sky have Black Friday deals for existing customers?

Yes. Sky Group’s 5 November 2026 announcement set Sky VIP mobile plans for existing customers at 10GB for £5 a month, 50GB for £10 a month and unlimited data for £14 a month, or unlimited for £10 a month for Sky VIP Diamond customers with more than 15 years at Sky. Those mobile offers run from 5 November to 2 December 2026 in the VIP section of the My Sky app.

Does giffgaff have a Black Friday deal for existing members?

Yes. As of 11 November 2026, giffgaff’s £12 18-month plan is 200GB (50GB plus 150GB extra), existing members opt in via the app, and giffgaff says you need to activate it by 7 December 2026. After 18 months the plan goes back to 50GB a month. The 40GB plan (was 6GB) is £8 a month on giffgaff’s contract page today.

How do I keep my number if I switch?

Text PAC to 65075 from your current phone, or request the code in your old provider’s app, then give it to the new provider. Ofcom’s rules mean the transfer should complete within one working day. Do not cancel your old plan first, or you can lose the number. If you are only upgrading inside the same network, you generally will not need a PAC code.

Will my bill go up in April if I stay or switch?

It depends on the plan. Vodafone’s 120GB upgrade rises by £2.50 to £16.50 from 1 April 2027. Many O2, EE, Three and Sky contracts also have advertised annual rises. SMARTY’s one-month plans and giffgaff’s 18-month range on this page are sold with no annual mid-contract rise, though Lebara’s Black Friday price still steps up after six months as part of the offer itself.

Is the Lebara Black Friday plan for existing Lebara customers?

No. The £3.20 introductory price is for new Lebara customers, through our link. If you already use Lebara, this is not the path on this page. If you are with another network and happy to use Vodafone’s coverage, the 30GB plan is £67.20 in the first year, then £8 a month from month seven, on a rolling 30-day SIM with no credit check.

Final decision

Start in your own app. If you are with Vodafone and can upgrade, the 120GB plan at £65.50 in the first year after cashback is the existing-customer offer in the first box. If you are with Sky or giffgaff, try Sky VIP or the giffgaff app opt-in before you leave. If you are ready to switch, Lebara’s 30GB plan is the lower first-year bill of the two boxes, and SMARTY’s 50GB plan is the simpler rolling alternative on Three’s network.