Here is a comparison of the iPhone 17, Redmi 15C 5G, and Samsung Galaxy M17 5G based on your specific requirements.

iPhone 17: This is the clear winner for luxury. It features a premium build with an aluminum frame, Ceramic Shield 2 front, and a color-infused glass back. Its brand value and high-end materials place it in the flagship luxury category.

Samsung M17 5G: Offers a "premium mid-range" feel with a slim 7.5mm design and a vivid Super AMOLED display, which looks much better than standard LCDs.

Redmi 15C 5G: Focuses on practical aesthetics. While it has an elegant "floating crater" camera design, the build is primarily plastic, aimed at durability and cost-savings.

2. Battery Life

Redmi 15C 5G: The "Battery King" in this group. It features a massive 6,000 mAh battery that can easily last over two days of moderate use. It supports 33W fast charging.

Samsung M17 5G: Comes with a standard 5,000 mAh battery and 25W charging. It is reliable for a full day but falls short of the Redmi’s sheer capacity.

iPhone 17: While the capacity is numerically smaller (~3,692 mAh), Apple’s A19 chip is highly efficient. It is rated for up to 30 hours of video playback, which competes well with larger batteries, though it may require more frequent daily charging under heavy use.

3. Budget & Price

Redmi 15C 5G: The best choice for budget-conscious buyers, starting at approximately ₹12,499.

Samsung M17 5G: Slightly more expensive, starting around ₹13,999. It provides better software support (6 years of updates) and a better screen for the extra cost.

iPhone 17: Not a budget device. Starting at ₹82,900, it is nearly 6-7 times the price of the others.

4. NFC & Sensors

Samsung M17 5G: Excellent for utility. It supports NFC for Samsung Wallet (Tap & Pay) and includes a physical Gyroscope and Optical Image Stabilization (OIS) in the camera, which is rare at this price point.

iPhone 17: Full NFC support for Apple Pay and advanced biometric security via Face ID. It also includes a barometer and high-g accelerometer for crash detection.

Redmi 15C 5G: Includes basic sensors like an accelerometer and electronic compass. NFC is available but can be market-dependent, so it is important to check the specific regional variant 

Summary Verdict

Best for Luxury: iPhone 17. If you want the best materials, prestige, and high-end performance.

Best for Battery: Redmi 15C 5G. If you need a phone that stays alive for days without a charger.

Best for Budget + Tech (Value): Samsung M17 5G. It strikes a perfect balance with a great AMOLED screen, 5G, and NFC for a very affordable price.