Infinix · X6840
Infinix SMART 20
Infinix SMART 20 is a 6.78-inch 4G smartphone with the MediaTek Helio G81 Ultimate chip, an 8 MP main camera and a 5,200 mAh battery.
In short
Infinix SMART 20 is a phone from Infinix. Its Comparezi Score is 16.1 out of 100, ranked #333 of 347 phones. Key specifications: display size 6.78", processor MediaTek Helio G81 Ultimate, RAM 4 GB.
Should you buy it now?
Better alternative available
C71 scores 21.1 against 16.1 here and costs ₹8,999.
See C71 →- Display size
- 6.78"
- Processor
- MediaTek Helio G81 Ultimate
- RAM
- 4 GB
- Main camera
- 8 MP
- Battery
- 5,200 mAh
Variants
Where to buy
Store links are not paid: prices are copied from each store's own page with the date checked, and Comparezi earns only from labelled ads. How we earn
-
Infinix Store
4 GB RAM + 64 GB
₹12,999
MRP ₹19,999
Out Of Stock View offer at Infinix Store -
Infinix Store
4 GB RAM + 128 GB
₹14,499
MRP ₹21,999
Out Of Stock View offer at Infinix Store
Prices checked 2 days ago.
Comparezi Score
How the 16.1 was computed
| Factor | This product | Position in category | Weight | Points |
|---|---|---|---|---|
| Refresh rate | 120 Hz |
57%
|
5.4 | |
| Battery | 5,200 mAh |
21%
|
5.0 | |
| RAM | 4 GB |
14%
|
2.5 | |
| Display size | 6.78" |
34%
|
2.0 | |
| Storage | 64 GB |
7%
|
0.8 | |
| Charging speed | 15 W |
5%
|
0.4 | |
| Main camera | 8 MP |
lowest
|
0.0 | |
| Weight (not published, left out) | — | not recorded | 0.0 | |
| 5G | No | does not have it | 0.0 |
Each factor is placed between the lowest and highest value in Phones (0-100 %), multiplied by its weight, and summed. It is a computed figure, not a rating, and never uses reviews.
Cons
- No 5G support
- Slower wired charging (15 W) than most phones on Comparezi
- Water resistance limited to splashes (IP64)
- No published update policy
Who should avoid it
- Not ideal for Battery life · What matters most? (pick any) #299 of 368
Full specifications
Display
| Display size | 6.78" |
|---|---|
| Display type | IPS LCD |
| Resolution | 720 x 1576 |
| Refresh rate | 120 Hz |
| Peak brightness | 700 nits |
| Brightness measured as | High brightness mode, HBM |
Performance
| Processor | MediaTek Helio G81 Ultimate |
|---|---|
| RAM | 4 GB |
| Storage | 64 GB |
| Memory options | 4 GB + |
Camera
| Main camera | 8 MP |
|---|---|
| Front camera | 8 MP |
Battery
| Battery | 5,200 mAh |
|---|---|
| Charging speed | 15 W |
Software
| Operating system | Android |
|---|---|
| Software | Android 16, XOS 16 |
Build
| 5G | No |
|---|---|
| Water resistance | IP64 |
| SIM | 2 nano SIMs + |
| Colours | Shadow Black, Polaris Titanium, Sunlike Orange, Cloudline Blue |
About the SMART 20
Infinix SMART 20 is a 6.78-inch 4G smartphone with the MediaTek Helio G81 Ultimate chip, an 8 MP main camera and a 5,200 mAh battery. It is one of 12 Infinix phones and 368 phones compared on Comparezi.
Infinix SMART 20 at a glance
- Display: 6.78-inch IPS LCD, 120 Hz
- Processor: MediaTek Helio G81 Ultimate
- Memory: 4 GB + 64 GB, 4 GB + 128 GB
- Cameras: an 8 MP main rear camera and an 8 MP front camera
- Battery: 5,200 mAh, 15 W wired charging
- Software (as listed): Android 16, XOS 16
- Water and dust: IP64
Display
The Infinix SMART 20 has a 6.78-inch IPS LCD screen with a resolution of 720 x 1576. It refreshes at up to 120 Hz. Infinix quotes a peak brightness of 700 nits (measured as high brightness mode, HBM). Brands measure peak brightness in different ways (full screen, a small bright area, high brightness mode), so Comparezi does not rank phones on this figure.
Performance and memory
It runs on the MediaTek Helio G81 Ultimate. Memory options: 4 GB + 64 GB, 4 GB + 128 GB.
Cameras
The main camera has a 8 MP sensor. The front camera is 8 MP.
Battery and charging
The battery is rated at 5,200 mAh. Wired charging is rated at up to 15 W.
Software and updates
Infinix lists its software as Android 16, XOS 16. Infinix does not publish an OS or security update policy for this model.
Design and durability
It is rated IP64: dust-tight and protected against splashing water. It is a 4G phone without 5G. SIM: 2 nano SIMs + Micro SD. Colours: Shadow Black, Polaris Titanium, Sunlike Orange, Cloudline Blue.
Who should buy the Infinix SMART 20
On its published specifications, no single spec of the Infinix SMART 20 stands out against the 368 phones Comparezi tracks; compare it with the phones below before deciding.
Trade-offs
- No 5G support
- Slower wired charging (15 W) than most phones on Comparezi
- Water resistance limited to splashes (IP64)
- No published update policy
How the Infinix SMART 20 compares
The phones closest to it on specifications, from other brands:
- Lava Storm Lite 5G: main camera 8 MP on the Infinix SMART 20 vs 50 MP on the Lava Storm Lite 5G. Infinix SMART 20 vs Lava Storm Lite 5G: full comparison
- POCO C71: main camera 8 MP on the Infinix SMART 20 vs 32 MP on the POCO C71. Infinix SMART 20 vs POCO C71: full comparison
- itel Zeno 200. Infinix SMART 20 vs itel Zeno 200: full comparison
- realme C100i: battery 5,200 mAh on the Infinix SMART 20 vs 6,500 mAh on the realme C100i. Infinix SMART 20 vs realme C100i: full comparison
Other Infinix phones
- Infinix SMART 10 (Infinix SMART 20 vs Infinix SMART 10)
- Infinix HOT 60 5G+ (Infinix SMART 20 vs Infinix HOT 60 5G+)
- Infinix HOT 60i 5G (Infinix SMART 20 vs Infinix HOT 60i 5G)
See all Infinix phones.
Specifications from Infinix's official product page (infinixmobiles.in), checked 12 October 2026. Specifications the manufacturer does not publish are left blank rather than estimated. Percentages compare published figures only; see how Comparezi compares phones.
Alternatives
Alternatives to the SMART 20
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Head to head
Compare the SMART 20
SMART 20 vs Zeno 200
- SMART 20
- Zeno 200
SMART 20 vs Storm Lite 5G
- SMART 20
- Storm Lite 5G
SMART 20 vs Bold N1 5G
- SMART 20
- Bold N1 5G
SMART 20 vs 14C 5G
- SMART 20
-
14C 5G
Questions
SMART 20 FAQs
Data sources
- Manufacturer official pages
- Brand store (checked automatically)
Last updated
Product details
Prices checked
Disclosure
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