The technical specifications show that both phones share their processor, battery capacity and camera resolutions. The S25 Ultra differs through its curved display, lighter body and wider internal-storage options.
General
The itel S25 Ultra weighs 163 g, while the itel S25 weighs 185 g, making the Ultra 22 g lighter for easier everyday carrying.
| Specification | itel S25 Ultra | itel S25 |
|---|
| Model | S25 Ultra | S25 |
| Manufacturer | itel | itel |
| SIM | Dual Nano SIM | Dual Nano SIM |
| Network support | 4G | 4G |
| Dimensions | 164.2 x 74.6 x 6.9 mm | 165.6 x 75.6 x 7.3 mm |
| Weight | 163 g | 185 g |
| Warranty | NA | Na |
Display and design
The S25 Ultra uses a 6.78-inch curved AMOLED display with 120Hz refresh rate, while the S25 uses a 6.78-inch flat AMOLED display with the same refresh rate.
| Specification | itel S25 Ultra | itel S25 |
|---|
| Display size | 6.78-inch | 6.78-inch |
| Display type | 3D-curved AMOLED | AMOLED |
| Resolution | 1080 x 2436 pixel | 1080 x 2436 pixel |
| Refresh rate | 120Hz | 120Hz |
| Touch sampling rate | 1500Hz | 1500Hz |
| Peak brightness | 1400 nits | 1800 nits |
| Display protection | Corning Gorilla Glass 7i | Scratch-resistant glass |
| Fingerprint sensor | In-display | In-display |
| Water and dust resistance | IP64 | IP54 |
Pro tip: The S25 Ultra has the curved display design, while the S25 has a flat panel. The S25 lists a higher peak-brightness figure.
Performance and software
Both phones use the Unisoc T620 processor, while the S25 Ultra comes with 8GB RAM and up to 512GB storage for users who keep more apps and files.
| Specification | itel S25 Ultra | itel S25 |
|---|
| Processor | Unisoc T620 | Unisoc T620 |
| Processor core | Octa-core, up to 2.2 GHz | Octa-core, up to 2.2 GHz |
| GPU | Mali-G57 | Mali-G57 |
| Manufacturing process | 12 nm | 12 nm |
| RAM | 8GB + extended RAM | 6GB/8GB + extended RAM |
| Operating system | Android 14 | Android 14 |
| User interface | itel OS 14.5 | itel OS 14.5 |
Buy this if: Choose the S25 Ultra if you want more internal storage options and 8GB RAM as standard.
Camera features
Both models use a 50MP rear camera and 32MP front camera, giving the two phones similar camera resolutions for everyday photography and selfies.
| Specification | itel S25 Ultra | itel S25 |
|---|
| Rear camera setup | 50MP rear camera | 50MP rear camera |
| Main camera | 50MP | 50MP |
| Front camera | 32MP | 32MP |
| Rear video recording | Up to 2K | Up to 2K |
| Front video recording | NA | NA |
Storage and connectivity
The itel S25 Ultra provides up to 512GB internal storage, while the S25 combines 128GB storage with expandable-storage support for users who need extra space.
| Specification | itel S25 Ultra | itel S25 |
|---|
| Storage options | 128GB/256GB/512GB | 128GB |
| Expandable storage | Not verified | Supported |
| Wi-Fi | Wi-Fi | Wi-Fi |
| Bluetooth | Bluetooth | Bluetooth |
| GPS | Supported | Supported |
| NFC | Supported | Supported |
| USB | USB Type-C | USB Type-C |
| 3.5mm headphone jack | NA | Supported |
| IR blaster | Supported | Supported |
Keep in mind: The S25 has expandable storage and a 3.5mm headphone jack. These can matter if you use wired headphones or need more storage.
Battery and other features
Both phones use 5,000 mAh batteries and support 18 W wired charging, so battery capacity and charging power are closely matched.
| Specification | itel S25 Ultra | itel S25 |
|---|
| Battery capacity | 5,000 mAh | 5,000 mAh |
| Wired charging | 18 W | 18 W |
| Wireless charging | Not supported | Not supported |
| Reverse charging | NA | NA |
| Security | In-display fingerprint sensor | In-display fingerprint sensor |
| Water and dust protection | IP64 | IP54 |
Pro tip: Battery capacity does not separate these models. Look at the display, RAM, storage and body design when making your choice.