Slimmest Phones in India: Prices & Specs (Oct)

Updated 15 November 2026 · Standard formula, shown below

As of October, the slimmest phones officially available in India are the Tecno Spark Slim (at 6.2mm) and the iQOO 12 (at 8.1mm), though the iQOO is the slimmest mainstream flagship you can actually buy right now. Below is a breakdown of the current ultra-thin models, their exact prices, full specifications, and what the thin design costs you in battery and camera hardware.

What Counts as a Slim Phone in 2024?

The definition of a slim phone has changed. A few years ago, 8mm was considered thin. Now, the market has split into two groups:

Ultra-slim (under 7.5mm): These are usually mid-range or special-edition devices that cut corners on battery size and camera sensors to hit the number.
Flagship slim (around 8-8.5mm): These pack large batteries, periscope zoom cameras, and still manage to be thinner than the average 9mm phone.

The average smartphone in India is about 8.5-9mm thick. Anything below 8mm stands out. Anything below 7mm is rare and usually comes with a major compromise.

The Current Slimmest Phones: Prices and Specs

Here are the thinnest phones you can actually buy from Indian retailers in October, listed from thinnest to thickest:

1. Tecno Spark Slim (6.2mm) – Not Yet Released

This phone was announced in late September but has not hit Indian store shelves yet. It is expected to launch around Diwali. If it does, it will be the thinnest phone in India by a wide margin.

Price: Expected ₹15,999 (unofficial)
Thickness: 6.2mm
Display: 6.78-inch AMOLED, 120Hz
Processor: MediaTek Dimensity 6300
Battery: 5,000mAh (thin battery tech)
Cameras: 50MP main + 2MP depth

This is the first phone to break the 6.5mm barrier in India. The catch is that it is not available yet, and the price is a rumour.

2. iQOO 12 (8.1mm) – The Slimmest Flagship You Can Buy

This is the thinnest phone with flagship specs currently in stock at major Indian retailers.

Price: ₹52,999 (8GB/256GB)
Thickness: 8.1mm
Display: 6.78-inch LTPO AMOLED, 144Hz
Processor: Snapdragon 8 Gen 3
Battery: 5,000mAh
Cameras: 50MP main + 50MP ultrawide + 64MP periscope (3x optical)

What makes this impressive is that it packs a periscope zoom lens and a 5,000mAh battery into an 8.1mm frame. That is a real engineering achievement.

3. OnePlus 12R (8.8mm) – The Slim Value Flagship

If you want a thin phone with a huge battery, this is the one.

Price: ₹39,999 (8GB/128GB)
Thickness: 8.8mm
Display: 6.78-inch LTPO AMOLED, 120Hz
Processor: Snapdragon 8 Gen 2
Battery: 5,500mAh
Cameras: 50MP main + 8MP ultrawide + 2MP macro

It is not the absolute thinnest, but it offers the best balance of thinness and battery life at this price point.

4. Samsung Galaxy S24 (7.6mm) – The Compact Thin Option

This is the thinnest mainstream compact phone in India.

Price: ₹79,999 (8GB/256GB)
Thickness: 7.6mm
Display: 6.2-inch Dynamic AMOLED 2X, 120Hz
Processor: Exynos 2400 (India variant)
Battery: 4,000mAh
Cameras: 50MP main + 12MP ultrawide + 10MP telephoto (3x)

It is thin, but the small battery is a trade-off for the compact size.

How to Check the Real Thickness

Phone makers list thickness in millimetres, but they often measure the thinnest point of the edge, not the centre where the camera bump sits. When comparing, look at the stated thickness without the camera bump and also check the camera bump height separately. A phone that is 7.6mm at the edge but has a 2mm camera bump will feel much thicker in your pocket than a uniform 8.5mm slab.

You can also measure it yourself: place the phone on a flat surface, put a ruler against the side, and measure from the surface to the top of the back panel (not the camera). That is the real thickness you feel when holding it.

What You Give Up for a Slim Phone

There is no free lunch. A thinner body means one of these compromises:

Smaller battery: The Samsung S24 has a 4,000mAh battery, which is below the 5,000mAh standard for flagships. Expect a day of moderate use, not two.
Camera bump: The iQOO 12 is 8.1mm at the edge, but the camera module sticks out another 2-3mm. It will not lie flat on a table.
Less cooling: Thin phones have less room for vapour chambers. Under heavy gaming, they may throttle sooner than thicker phones with the same chip.
No headphone jack: Almost all slim phones drop the 3.5mm jack. You will need USB-C earphones or wireless buds.

Why the Thinnest Phones Are Rare in India

The Indian market favours big batteries and dual-SIM slots. Most buyers prefer a 5,000mAh battery over a 6.5mm waistline. That is why brands like Xiaomi and Realme rarely push below 8mm. They know that a 7mm phone with a 4,500mAh battery will lose to an 8.5mm phone with a 5,500mAh battery in online reviews and store comparisons.

Also, thin phones are more expensive to manufacture. They require custom battery cells, thinner display panels, and more precise assembly. That cost is passed on to you, which is why the Tecno Spark Slim, despite being a mid-range chipset, is expected to cost more than a typical 6.5mm-thick phone with the same processor.

How to Choose the Right Slim Phone

Ask yourself these three questions before buying:

Do you need a full day of battery? If yes, avoid anything under 4,500mAh. The iQOO 12 (5,000mAh) and OnePlus 12R (5,500mAh) are safer.
Do you take zoom photos? If yes, you need a periscope lens. The iQOO 12 has one, but the OnePlus 12R does not.
Do you use a case? A 0.5mm case adds 1-2mm of thickness. A 7.6mm phone with a case becomes 9mm. If you always use a case, the thinness matters less, so you can buy a thicker phone with a bigger battery.

Frequently Asked Questions

Is the Tecno Spark Slim actually available in India?

No, not as of early October. It was announced at a global event, but there is no confirmed Indian launch date or official price. Do not pay any advance money for it based on rumour. Wait for the official announcement.

Which is thinner: iPhone 15 or Samsung S24?

The Samsung S24 is 7.6mm, while the iPhone 15 is 7.8mm. So the Samsung is slightly thinner, but the difference is only 0.2mm – you will not feel it in daily use. The iPhone 15 also has a smaller battery (3,349mAh), so it is not a better choice for battery life.

Does a thin phone overheat more?

Yes, generally. Thinner phones have less space for heat spreaders. The iQOO 12 uses a large vapour chamber to compensate, but budget thin phones like the Tecno Spark Slim may throttle under sustained gaming. For daily use, it is not a problem.

What is the thinnest phone ever made?

The thinnest ever produced was the Vivo X5 Max at 4.75mm, released in 2014. It was a niche product with a small battery and a weak camera. Modern phones are not going back to that extreme because the trade-offs are too severe.

Will a thin phone fit in a car mount or holder?

Yes, but you may need to adjust the clamp width. Most car mounts are designed for phones between 7mm and 10mm thick. A 6.2mm phone may be too thin for some clamps, causing it to slide. Test it before buying a mount.

Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.