iPhone 17 vs iPhone 15: All the expected upgrades and changes explained
Intro
The iPhone 15 marked a turning point for Apple’s base models, bringing the Dynamic Island, a 48 MP main camera, and the A16 Bionic chip. But it also highlighted Apple’s continued artificial limitations, with the most prominent being the infamous 60Hz screen, alongside limited RAM and sluggish charging.
With the iPhone 17, it looks like the course correction many users have been waiting for is finally coming. The new base model is said to finally come with a smooth 120Hz ProMotion display, a new 24 MP selfie camera, and a more polished design. Under the hood, the A19 chip and 8 GB RAM should bring it in line with Apple’s AI ambitions, while stacked battery tech and faster charging help close the gap with Android rivals.
But Apple might also raise the starting price from $799 to ~$850, slightly raising the stakes for anyone upgrading from an iPhone 15. Let’s see how the two compare across design, display, performance, cameras, and battery.
iPhone 17 vs iPhone 15 expected differences:
| iPhone 17 | iPhone 15 |
|---|---|
| AI-capable A19 chip (3nm N3P) | A16 Bionic (4nm) |
| 8 GB RAM | 6 GB |
| 24 MP selfie camera | 12 MP selfie camera |
| 6.3" OLED 120Hz ProMotion Thinner bezels | 6.1" OLED 60Hz Thicker bezels |
| ~ 3,600 mAh battery | 3,349 mAh |
| 35W wired 25W wireless with Qi2.2 support | 20W wired 15W MagSafe wireless |
| New spliced smoother frame | Sharper frame |
*expected
Table of Contents:
Design and Size
Refined design for higher comfort
The iPhone 15 refined Apple’s design formula with a softer aluminum frame, a textured matte back, and the addition of the Dynamic Island cutout. It kept a familiar look, but with minor ergonomic improvements.
The iPhone 17, however, is expected to introduce more substantial changes. Apple is reportedly using a new splicing process that smooths the transition between the back and frame, providing a seamless, curved feel rather than the sharper edges of the iPhone 15.
*expected
The bezels are also getting significantly thinner thanks to Apple’s new BRS (Border Reduction Structure) technology, making the phone look more modern and immersive. And while some early leaks suggested a center-aligned rear camera redesign, more recent dummy units indicate Apple will stick to a horizontal dual-camera layout. The bump itself may be slightly larger, with more prominent lens rings suggesting updated sensors.
The iPhone 17 is also said to be a bit thinner and lighter than the iPhone 15, and will come in a new lavender color option that’s reportedly more vivid than previous purple models.
Both models will continue to feature the Camera Control Button introduced with the iPhone 16 series, alongside the familiar Action button and USB-C port.
The iPhone 17, however, is expected to introduce more substantial changes. Apple is reportedly using a new splicing process that smooths the transition between the back and frame, providing a seamless, curved feel rather than the sharper edges of the iPhone 15.
| iPhone 17* | iPhone 15 |
|---|---|
| Thickness ~6.25 mm | Thickness 7.8 mm |
| Dimensions ~147 × 71 mm | Dimensions 147.6 x 71.6 |
| Weight ~170 g | Weight 171 g |
The bezels are also getting significantly thinner thanks to Apple’s new BRS (Border Reduction Structure) technology, making the phone look more modern and immersive. And while some early leaks suggested a center-aligned rear camera redesign, more recent dummy units indicate Apple will stick to a horizontal dual-camera layout. The bump itself may be slightly larger, with more prominent lens rings suggesting updated sensors.
The iPhone 17 is also said to be a bit thinner and lighter than the iPhone 15, and will come in a new lavender color option that’s reportedly more vivid than previous purple models.
Both models will continue to feature the Camera Control Button introduced with the iPhone 16 series, alongside the familiar Action button and USB-C port.
Display Differences
The iPhone 15 features a 6.1-inch OLED panel, while the iPhone 17 is expected to increase to 6.3 inches, putting it on par with the Pro models in terms of size. More importantly, it will be the first non-Pro iPhone with a 120Hz ProMotion refresh rate, making scrolling and animations much smoother.
*expected
The iPhone 17 is also rumored to use Samsung’s latest M14 OLED panels, which should bring better efficiency, longer lifespan, and higher brightness (most likely 3000 nits). Combined with slimmer bezels from BRS technology, the iPhone 17’s display will feel far more modern.
| iPhone 17* | iPhone 15 |
|---|---|
| Size 6.3 | Size 6.1 |
| Brightness 2000 nits (peak) | Brightness 2000 nits (peak) |
The iPhone 17 is also rumored to use Samsung’s latest M14 OLED panels, which should bring better efficiency, longer lifespan, and higher brightness (most likely 3000 nits). Combined with slimmer bezels from BRS technology, the iPhone 17’s display will feel far more modern.
Face ID remains the biometric method of choice, though the module may shrink slightly compared to the iPhone 15.
Performance and Software
An AI-ready Apple A19 chip
The iPhone 15 runs on the A16 Bionic (4nm), a capable chip that still delivers smooth performance. But it isn’t built with Apple’s upcoming AI push in mind.
The iPhone 17, on the other hand, is expected to feature the new A19 chip, likely built on TSMC’s refined 3nm process. It probably won’t get the vapor chamber cooling system that’s coming to the Pro models, instead relying on traditional graphite and metal shielding. Still, paired with 8 GB of RAM (up from 6 GB in the iPhone 15), it will be able to handle Apple's AI features.
| iPhone 17* | iPhone 15 |
|---|---|
| Chip A19 | Chip A16 |
| Process 3nm N3P | Process 4nm |
| RAM, Storage 8/128 GB 8/256 GB 8/512 GB LPDDR5X RAM NVMe storage | RAM, Storage 6/128 GB 6/256 GB 6/512 GB LPDDR5 RAM NVMe storage |
iOS 26 is expected on both phones, and it will bring a major Liquid Glass visual overhaul and functional additions like Call Screening, Live Translate for calls, spam filtering in Messages, and a simpler Camera app. The trouble is that Apple Intelligence still severely lags behind the competition. The most anticipated features, like Siri 2.0, were delayed to 2026 — and some reports suggest even 2027.
That means the iPhone 17’s A19 chip has the horsepower to handle advanced AI, but users may not fully see that payoff for at least another year. Owners of the iPhone 15, meanwhile, will get the same iOS 26 update, but its older chip and 6 GB RAM won't be able to support the heavier AI features that are coming down the line (most probably including Siri 2.0).
That means the iPhone 17’s A19 chip has the horsepower to handle advanced AI, but users may not fully see that payoff for at least another year. Owners of the iPhone 15, meanwhile, will get the same iOS 26 update, but its older chip and 6 GB RAM won't be able to support the heavier AI features that are coming down the line (most probably including Siri 2.0).
Camera
New, more powerful selfie camera on the iPhone 17
While the main and ultra-wide cameras may remain similar, there will be a new 24 MP selfie camera, which we expect to be a major upgrade as far as sharpness, detail, and low-light performance. Selfies should look noticeably crisper and give more flexibility for cropping.
*expected
| iPhone 17* | iPhone 15 |
|---|---|
| Main 48 MP, f/1.6 26 mm 1/1.56" sensor size | Main 48 MP, f/1.6 26 mm 1/1.56" sensor size |
| Ultrawide 12 MP, f/2.2 13 mm Unknown sensor size | Ultrawide 12 MP, f/2.2 13 mm Unknown sensor size |
| Telephoto None | Telephoto None |
| Selfie 24 MP | Selfie 12 MP |
Unfortunately, neither model offers a dedicated zoom lens — that remains exclusive to the Pro line.
Battery Life and Charging
Faster speeds and Qi2.2 support
Apple is moving the base iPhone into the modern charging era. The iPhone 17’s rumored stacked cell design is said to boost energy density and thermal stability. More importantly, charging speeds jump to 35W wired and 25W wireless with Qi2.2 support, making it compatible with third-party MagSafe-style accessories.
The iPhone 15 packs a 3,349 mAh battery with 20W wired charging and 15W MagSafe wireless speeds. It performs well but doesn’t break records.
The iPhone 17 is also expected to feature a slightly larger ~3,600 mAh battery.
The iPhone 17 is also expected to feature a slightly larger ~3,600 mAh battery.
| iPhone 17* | iPhone 15 |
|---|---|
| Battery size ~3,600 mAh | Battery size 3349 mAh |
| Charging speeds 35W wired 25W Qi2.2 USB-C 2.0 | Charging speeds 20W wired 15W USB-C 2.0 |
Apple is also continuing the repair-friendly adhesive system from the iPhone 16, making battery replacements far simpler compared to earlier generations.
Specs Comparison
Here's a quick look at the expected iPhone 17 vs iPhone15 specs comparison:
| iPhone 17 | iPhone 15 |
|---|---|
| Size, weight Similar footprint, but slimmer and lighter | Size, weight 147.6 x 71.6 x 7.8 mm 171 g |
| Screen 6.3" OLED 120Hz ProMotion | Screen 6.1" OLED 60Hz |
| Processor A19 3nm | Processor A16 Bionic 4nm |
| Versions: 8/128 GB 8/256 GB 8/512 GB LPDDR5X | Versions: 6/128 GB 6/256 GB 6/512 GB LPDDR5 |
| Cameras: 48 MP main 12 MP ultra 24 MP front | Cameras: 48 MP main 12 MP ultra 12 MP front |
| Battery: 3,600 mAh | Battery: 3,349 mAh |
| Charging: USB-C 35W wired 25W wireless Qi2.2 support | Charging: USB-C 20W wired 15W wireless with MagSafe --- |
*expected
Summary
The iPhone 17 looks like the base iPhone Apple should have released years ago. A 120Hz ProMotion display, sharper 24 MP selfie camera, faster charging, and slimmer bezels finally modernize the experience — and they’re backed by the new A19 chip and 8 GB RAM for AI readiness.
Compared to the iPhone 15, the improvements are clear and meaningful. But Apple is also expected to raise the price to ~$850, making this one of the more expensive base iPhones yet.
If you’re on an iPhone 15, the upgrade is tempting mainly for the smoother display and charging convenience. For users on older models, the iPhone 17 feels like the right moment to jump back in. Still, the absence of a telephoto lens shows that Apple is keeping some key perks locked behind the Pro wall.
Compared to the iPhone 15, the improvements are clear and meaningful. But Apple is also expected to raise the price to ~$850, making this one of the more expensive base iPhones yet.
If you’re on an iPhone 15, the upgrade is tempting mainly for the smoother display and charging convenience. For users on older models, the iPhone 17 feels like the right moment to jump back in. Still, the absence of a telephoto lens shows that Apple is keeping some key perks locked behind the Pro wall.
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