Compare iD Mobile iPhone 18 Pro Max deals ahead of Apple's expected mid-September 2026 launch, including the biggest battery jump in the range, a thicker redesign and a new adjustable camera — plus why iD Mobile is worth comparing once contracts go live.
In short: The iPhone 18 Pro Max is expected to be unveiled around 8–9 September 2026, going on sale roughly ten days later. It shares the Pro's headline upgrades — a thicker body housing a variable-aperture camera, Apple's first 2nm chip and a smaller Dynamic Island — but pulls ahead on battery, with regulatory filings pointing to the largest capacity increase anywhere in this year's line-up. Expect a higher price too, with analysts flagging rises of up to $200 across the Pro tier. Everything below is based on leaks and supply-chain reporting, not official confirmation.
iD Mobile deals for the iPhone 18 Pro Max will populate this page automatically once the handset goes on sale. Until then, here's the full rumour picture and why it's worth comparing iD Mobile against the bigger networks.
1. When is the iPhone 18 Pro Max coming out?
Apple's flagship keynote almost always lands on the first Tuesday or Wednesday after the US Labor Day holiday, and this year's date has narrowed to either 8 or 9 September 2026. The Wednesday slot is considered the stronger bet, since Apple tends to avoid scheduling its global press event on the day immediately after a public holiday, when many attendees are travelling in from overseas.
Sales typically begin on the Friday of the following week, pointing to 18 September 2026 as the likely on-sale date for the UK.
2. How much will the iPhone 18 Pro Max cost?
Component costs — memory above all — have risen sharply industry-wide, and the Pro Max is expected to feel it most. Some analysts have suggested increases of up to $200 over the iPhone 17 Pro Max's starting price, continuing a run of coordinated increases already seen on several iPad and MacBook models this year.
Even with a higher RRP, iD Mobile pay-monthly contracts should still work out cheaper than buying the Pro Max outright, especially a few weeks after launch once networks start competing more aggressively on data allowances and upfront pricing.
3. iPhone 18 Pro Max specs: what's rumoured
| Specification | iPhone 18 Pro Max (rumoured) |
|---|---|
| Screen size | ~6.9in |
| Thickness | ~9.9–10.9mm (up from 8.75mm on iPhone 17 Pro Max) |
| Chip | Apple's first 2nm chipset |
| Battery | ~5,391mAh (physical SIM) / ~5,567mAh (eSIM-only) |
| Rear camera | Variable-aperture main lens, adjustable light intake |
| Display | Smaller Dynamic Island (Face ID moved below display) |
| Colours | Includes a new Dark Cherry finish |
The battery is the standout upgrade
Regulatory certification data suggests the Pro Max's battery is growing by close to 12% for the physical-SIM version and around 9% for the eSIM-only model sold in markets like the US — comfortably the biggest generational jump of any model in the range this year. Combined with the efficiency gains from Apple's first 2nm chip, that points to genuinely longer battery life rather than just a bigger number on the spec sheet, addressing one of the more common criticisms of recent Pro Max generations.
Camera and design
The same variable-aperture camera rumoured for the standard Pro model is expected here too, letting the sensor physically adjust how much light it takes in for sharper low-light shots. That's the reason behind the thicker chassis — up from 8.75mm to a rumoured 9.9–10.9mm — alongside the larger battery cell. Rear glass is tipped to better match the body colour than on the iPhone 17 Pro Max, and the Dark Cherry colourway looks set to be one of the more distinctive options this year.
Modem and Dynamic Island
Some regions may see Apple's own in-house modem chip replace the Qualcomm modem used in recent generations, which could bring efficiency gains alongside satellite features already established in earlier iPhones. The Dynamic Island is also tipped to shrink, as Apple reportedly finds a way to move part of the Face ID hardware further beneath the display.
4. Why get the iPhone 18 Pro Max on iD Mobile?
iD Mobile runs on Three's UK network and generally undercuts the bigger four networks on pay-monthly pricing for equivalent data allowances — worth factoring in given the Pro Max is likely to be the most expensive standard iPhone this year (before you even consider the foldable). A few things to check when comparing deals:
- Total contract cost, since upfront fees can vary significantly between deals that look similar on monthly price alone.
- 36-month terms, which can lower the monthly cost meaningfully on a phone at this price point, provided you're comfortable committing for the full term.
- Trade-in offers, typically strongest in the first few weeks after launch when networks are competing hardest for pre-orders.
- eSIM support, since Apple has continued expanding eSIM-only sales in some markets each generation.
5. iPhone 18 Pro Max vs iPhone Ultra: is the foldable worth the extra cost?
If you want the biggest possible screen, the iPhone Ultra — Apple's first foldable — is expected to open into an iPad mini-sized display, but at a considerably higher price and reportedly without a telephoto lens. For most people who want flagship performance and camera quality without the novelty premium, the Pro Max remains the safer buy. Our iPhone Ultra guide breaks down the full comparison.
6. iPhone 18 Pro Max FAQs
When is the iPhone 18 Pro Max coming out?
Most likely announced on 9 September 2026, with UK sales starting around 18 September 2026.
How much bigger is the iPhone 18 Pro Max battery?
Regulatory filings point to close to a 12% increase for the physical-SIM version, the largest jump anywhere in this year's iPhone range.
Will the iPhone 18 Pro Max be more expensive than last year?
Yes, most likely — analysts have flagged rises of up to $200, driven by higher memory and component costs across the industry.
Is iD Mobile a good choice for a top-tier iPhone?
iD Mobile's contracts are typically priced below the bigger four UK networks for equivalent data, which is worth factoring in on a phone at this price point.
Everything on this page is based on leaks and rumour and will be updated as Apple confirms official details.
