Compare O2 iPhone 18 Pro deals ahead of Apple's expected September 2026 launch, including a genuinely new camera system, a noticeably thicker body, and how much more you'll likely pay to get it on O2.
In short: The iPhone 18 Pro is tipped to arrive alongside the standard iPhone 18, the Pro Max and Apple's first foldable, most likely on 8 or 9 September 2026. Unlike the standard model, the Pro is expected to gain a genuine headline feature this year — a variable aperture camera — plus a noticeably larger battery and a thicker chassis to fit it all in. Analysts are pencilling in a price rise of around £150–£170 over the iPhone 17 Pro, driven largely by the cost of memory. Everything here is drawn from leaks and supply-chain reporting; Apple has confirmed nothing.
O2 iPhone 18 Pro deals will populate this page as soon as the network lists them. In the meantime, here's what the leaks say, how it compares with last year's Pro, and what O2 specifically adds to the contract.
1. When is the iPhone 18 Pro coming out?
Apple's own September cadence is one of the most predictable things in tech: a Tuesday or Wednesday keynote, followed by pre-orders within days and a sale date the following Friday. Bloomberg's Mark Gurman has suggested Tuesday 8 September 2026 as Apple's likely date, based on the company's usual scheduling logic. Other industry watchers think Apple avoids holding a major keynote the day immediately after the US Labor Day public holiday, when many staff and travelling press would rather not be working, and expect Wednesday 9 September instead.
Following the normal pattern, that puts the on-sale date at roughly 18 September 2026 — the date O2 iPhone 18 Pro deals should first appear.
2. How much will the iPhone 18 Pro cost on O2?
No pricing is official, but the direction is fairly consistent across analyst commentary: expect a rise of somewhere in the region of £150–£170 over the iPhone 17 Pro's starting price, largely explained by the higher cost of memory and storage this generation. Apple has already nudged up prices on several iPad and MacBook models ahead of the iPhone launch, which analysts read as Apple softening the ground for a similar increase on iPhones in September.
On an O2 contract, that increase typically shows up as a modestly higher monthly cost rather than a large upfront jump, especially if you spread the device cost over 36 months instead of 24. As always, the keenest O2 iPhone 18 Pro deals tend to appear a few weeks after the initial launch rush.
3. iPhone 18 Pro specs: what's rumoured
| Specification | iPhone 18 Pro (rumoured) |
|---|---|
| Chip | New Apple silicon, 2nm process |
| Thickness | Around 9.9–10.9mm (up from 8.75mm on iPhone 17 Pro) |
| Camera | New variable aperture rear camera |
| Battery (SIM model) | Around 4,056mAh (up from 3,988mAh) |
| Battery (eSIM-only model) | Around 4,288mAh (up from 4,252mAh) |
| Dynamic Island | Smaller, with Face ID components moved beneath the display |
| Modem | New in-house Apple modem in some regions |
A thicker body, on purpose
Where the standard iPhone 18 is expected to keep a familiar shape, the Pro is rumoured to get noticeably chunkier — reportedly stretching to somewhere between 9.9mm and 10.9mm, up from 8.75mm on the iPhone 17 Pro (itself thicker than the iPhone 16 Pro). That's not a manufacturing slip; it's reportedly the trade-off for fitting in the Pro's headline new feature.
The variable aperture camera
The standout upgrade is a variable aperture on the main camera, letting you manually control how much light reaches the sensor for more flexible low-light and depth-of-field shots — a feature previously seen on rival flagships but new to iPhone. It's the main reason for the extra thickness, and it's expected to be exclusive to the Pro and Pro Max this generation.
Bigger batteries, confirmed by certification
Battery figures for the Pro models have reportedly already been logged with China's 3C certification body, giving an unusually early degree of confidence. The SIM-card version of the iPhone 18 Pro is said to carry a 4,056mAh battery, up modestly from 3,988mAh on the iPhone 17 Pro, while the eSIM-only variant sold in some markets rises from 4,252mAh to roughly 4,288mAh.
Dynamic Island and design
Leaks point to a smaller Dynamic Island, made possible by moving some Face ID hardware beneath the display panel — a change that should make for a cleaner-looking front glass without sacrificing Face ID's accuracy. Rear glass is tipped to better match the body colour this year, and a new Dark Cherry finish has been mentioned repeatedly in leaks.
4. iPhone 18 Pro vs iPhone 17 Pro: what's actually changing?
| iPhone 17 Pro (current) | iPhone 18 Pro (expected) | |
|---|---|---|
| Thickness | 8.75mm | ~9.9–10.9mm |
| Camera | Fixed aperture | Variable aperture |
| Battery (SIM model) | 3,988mAh | ~4,056mAh |
| Dynamic Island | Standard size | Smaller |
| Chip | Previous generation | New chip, 2nm process |
This shapes up as a genuine camera-and-battery generation for the Pro, rather than an incremental refresh — the trade-off being a chunkier phone in the hand.
5. Why buy the iPhone 18 Pro on O2?
The Pro's bigger battery pairs well with O2's UK-wide 5G coverage for anyone who's away from a charger for long stretches of the day. Every new iPhone contract on O2 includes access to O2 Priority, which regularly serves up early ticket access and dining discounts on top of your existing plan. For a phone at this price point, it's also worth asking O2 about trade-in values for your current handset — Pro-to-Pro upgrades tend to hold their trade-in value well, which can meaningfully soften the higher upfront cost.
6. What to expect from O2 iPhone 18 Pro deals at launch
- The variable aperture camera is a genuine differentiator this year, so expect strong early demand and correspondingly firm launch pricing.
- Trade-in offers are typically most generous in the first few weeks after launch, when O2 is competing hardest for pre-orders.
- 36-month contracts may be worth considering given the likely price rise, as they spread the extra cost more thinly per month.
7. Should you wait, or buy an iPhone 17 Pro now?
If you don't specifically need the variable aperture camera, the iPhone 17 Pro remains an excellent phone and should get noticeably cheaper once the 18 Pro lands. For photography enthusiasts, though, this looks like one of the more meaningful camera upgrades in recent iPhone generations, and worth the wait if that's your priority.
Compare the standard iPhone 18 on O2 → if you don't need the Pro's camera upgrade, or see how the iPhone 18 Pro Max compares if you want an even bigger battery and screen.
8. iPhone 18 Pro FAQs
When is the iPhone 18 Pro coming out?
Most likely 8 or 9 September 2026, with O2 iPhone 18 Pro deals expected to go live around 18 September.
Why is the iPhone 18 Pro thicker than the iPhone 17 Pro?
Leaks point to the new variable aperture camera system needing more internal space, pushing the body from 8.75mm up to somewhere around 9.9–10.9mm.
How much bigger is the battery?
Certification filings suggest a modest rise from 3,988mAh to around 4,056mAh on the SIM-card model, with the eSIM-only version rising from 4,252mAh to about 4,288mAh.
Does the iPhone 18 Pro cost more than the iPhone 17 Pro?
Analysts expect a rise of roughly £150–£170, driven mainly by higher memory costs, though Apple hasn't confirmed pricing.
Is the iPhone 18 Pro or Pro Max better value on O2?
The Pro Max carries an even bigger battery jump and screen, so it's worth comparing both before deciding — see our iPhone 18 Pro Max deals guide.
Everything on this page is based on leaks and rumour and will be updated as Apple confirms official details.
