O2 Unlimited + 100GB at £21 Deals
Here are details of the O2 Unlimited + 100GB at £21 tariff along with all the mobile phones currently available on the tariff. Alongside each phone is information about the cheapest deal and you can get full details by clicking on the 'Buy Now' links which will take you to the relevant retailer's site.
O2 Unlimited + 100GB at £21 Tariff Details
| Network | Tariff Name | Contract Length | Free Mins | Free Txts | Initial Monthly Cost |
|---|---|---|---|---|---|
 | O2 Unlimited + 100GB at £21 (24) | 24 Months | Unlimited | Unlimited | £21.00 Monthly price will increase every April by £1.80 |
Mobiles Available on O2 Unlimited + 100GB at £21
| Phone | Upfront Cost | Offer Details | Total Cost | Buy Online |
|---|---|---|---|---|
 Samsung Galaxy S21 128GB Phantom Grey | £9.00 | Samsung Galaxy S21 128GB Phantom Grey | equivalent to £21.38/mth over 24 mths |   View More Info |
 Samsung Galaxy A56 256GB Awesome Graphite | £59.00 | Samsung Galaxy A56 256GB Awesome Graphite | equivalent to £23.46/mth over 24 mths |  View More Info |
 Samsung Galaxy A56 256GB Awesome Lightgrey | £59.00 | Samsung Galaxy A56 256GB Awesome Lightgrey | equivalent to £23.46/mth over 24 mths | View More Info |
 Samsung Galaxy A56 256GB Awesome Olive | £59.00 | Samsung Galaxy A56 256GB Awesome Olive | equivalent to £23.46/mth over 24 mths | View More Info |
 Samsung Galaxy A56 256GB Awesome Pink | £59.00 | Samsung Galaxy A56 256GB Awesome Pink | equivalent to £23.46/mth over 24 mths | View More Info |
 Samsung Galaxy S21 Ultra 128GB Phantom Black | £129.00 | Samsung Galaxy S21 Ultra 128GB Phantom Black | equivalent to £26.38/mth over 24 mths | View More Info |
 Apple iPhone 13 128GB Midnight | £139.00 | Apple iPhone 13 128GB Midnight | equivalent to £26.79/mth over 24 mths | View More Info |
 Apple iPhone 13 128GB Starlight | £139.00 | Apple iPhone 13 128GB Starlight | equivalent to £26.79/mth over 24 mths | View More Info |
 Samsung Galaxy A54 5G 128GB Awesome Lime | £139.00 | Samsung Galaxy A54 5G 128GB Awesome Lime | equivalent to £26.79/mth over 24 mths | View More Info |
 Samsung Galaxy A54 5G 128GB Awesome White | £139.00 | Samsung Galaxy A54 5G 128GB Awesome White | equivalent to £26.79/mth over 24 mths | View More Info |
 Google Pixel 8a 256GB Obsidian | £209.00 | Google Pixel 8a 256GB Obsidian | equivalent to £29.71/mth over 24 mths | View More Info |
 Apple iPhone 14 256GB Starlight | £259.00 | Apple iPhone 14 256GB Starlight | equivalent to £31.79/mth over 24 mths | View More Info |
 Google Pixel 9 128GB Wintergreen | £299.00 | Google Pixel 9 128GB Wintergreen | equivalent to £33.46/mth over 24 mths | View More Info |
 Google Pixel 9 128GB Porcelain | £299.00 | Google Pixel 9 128GB Porcelain | equivalent to £33.46/mth over 24 mths | View More Info |
 Google Pixel 9 128GB Obsidian | £299.00 | Google Pixel 9 128GB Obsidian | equivalent to £33.46/mth over 24 mths | View More Info |
 Google Pixel 9a 256GB Obsidian | £319.00 | Google Pixel 9a 256GB Obsidian | equivalent to £34.29/mth over 24 mths | View More Info |
 Google Pixel 9a 256GB Iris | £319.00 | Google Pixel 9a 256GB Iris | equivalent to £34.29/mth over 24 mths | View More Info |
 Apple iPhone 16e 256GB White | £409.00 | Apple iPhone 16e 256GB White | equivalent to £38.04/mth over 24 mths | View More Info |
 Apple iPhone 16e 256GB Black | £409.00 | Apple iPhone 16e 256GB Black | equivalent to £38.04/mth over 24 mths | View More Info |
 Apple iPhone 15 Plus 128GB Yellow | £479.00 | Apple iPhone 15 Plus 128GB Yellow | equivalent to £40.96/mth over 24 mths | View More Info |
 Apple iPhone 15 Plus 128GB Green | £479.00 | Apple iPhone 15 Plus 128GB Green | equivalent to £40.96/mth over 24 mths | View More Info |
 Apple iPhone 15 Plus 128GB Black | £479.00 | Apple iPhone 15 Plus 128GB Black | equivalent to £40.96/mth over 24 mths | View More Info |
 Apple iPhone 16 Pro 128GB Black Titanium | £529.00 | Apple iPhone 16 Pro 128GB Black Titanium | equivalent to £43.04/mth over 24 mths | View More Info |
 Apple iPhone 16 Pro 128GB White Titanium | £529.00 | Apple iPhone 16 Pro 128GB White Titanium | equivalent to £43.04/mth over 24 mths | View More Info |
 Apple iPhone 16 Pro 128GB Natural Titanium | £529.00 | Apple iPhone 16 Pro 128GB Natural Titanium | equivalent to £43.04/mth over 24 mths | View More Info |
 Apple iPhone 16 Pro 128GB Desert Titanium | £529.00 | Apple iPhone 16 Pro 128GB Desert Titanium | equivalent to £43.04/mth over 24 mths | View More Info |
 Samsung Galaxy S25 Plus 512GB Navy | £639.00 | Samsung Galaxy S25 Plus 512GB Navy | equivalent to £47.63/mth over 24 mths | View More Info |
 Samsung Galaxy S25 Plus 512GB Icyblue | £639.00 | Samsung Galaxy S25 Plus 512GB Icyblue | equivalent to £47.63/mth over 24 mths | View More Info |
 Samsung Galaxy S25 Plus 512GB Silver Shadow | £639.00 | Samsung Galaxy S25 Plus 512GB Silver Shadow | equivalent to £47.63/mth over 24 mths | View More Info |
 Apple iPhone 15 Pro Max 1TB Natural Titanium | £789.00 | Apple iPhone 15 Pro Max 1TB Natural Titanium | equivalent to £53.88/mth over 24 mths | View More Info |