Best Smartphone Under US$100 in 2026
Report date: 14 October 2026
Target market: Bangladesh
Budget: US$100 maximum (approximately ৳12,000, depending on the exchange rate)
Primary objective: Identify the single best smartphone for maximum performance and overall hardware value within the budget.
1. Executive Summary
This report evaluates three smartphone options for buyers seeking the best possible performance within a budget of US$100. The assessment prioritizes processor and graphics performance, display quality, memory and storage, battery capacity, charging, camera capabilities, and purchase risks.
The main finding is that a carefully selected used performance-oriented smartphone may provide substantially better hardware than a new entry-level device at the same price.
The POCO F3 (6GB RAM / 128GB storage) is the recommended overall choice, provided a fully functional unit with its original display can be purchased for approximately ৳11,000–৳12,000. Its Qualcomm Snapdragon 870 processor, Adreno 650 GPU, 120Hz AMOLED display, UFS 3.1 storage, stereo speakers, and 33W charging provide a particularly strong hardware combination.
For buyers who require a new phone, the Infinix Smart 9 (4GB RAM / 128GB storage) is the alternative considered in this report. It sacrifices substantial processing power but offers the advantages of purchasing a newer device.
Final recommendation: Buy a verified, fully functional POCO F3 at or below ৳12,000. Do not purchase a damaged or poorly repaired unit solely because of its high specifications.
2. Research Objective and Evaluation Method
The purpose of this assessment is to identify the strongest practical smartphone available within the specified budget, rather than simply selecting the newest or cheapest device.
The evaluation uses the following criteria:
| Evaluation criterion | Priority |
|---|---|
| CPU and GPU performance | Very high |
| Display quality and refresh rate | High |
| RAM and storage performance | High |
| Battery capacity and charging | High |
| Camera capabilities | Medium |
| Connectivity and multimedia | Medium |
| Software support and device age | High |
| Purchase condition and repair history | Very high |
| Price and overall value | Very high |
The comparison considers both used and new devices. Listed prices are indicative asking prices rather than guaranteed transaction prices. Performance figures are historical benchmarks and should not be treated as measurements of every individual device.
3. Smartphone Candidates
3.1 POCO F3 — Overall Winner
Recommended configuration: 6GB RAM / 128GB storage
Target used price: ৳11,000–৳12,000
The POCO F3 was released in 2021 as a performance-focused smartphone. Its specifications remain highly competitive for demanding workloads when compared with many entry-level devices.
Key specifications
| Feature | Specification |
|---|---|
| Processor | Qualcomm Snapdragon 870 |
| GPU | Adreno 650 |
| Display | 6.67-inch AMOLED |
| Refresh rate | 120Hz |
| Resolution | 2400 × 1080 pixels |
| RAM | 6GB in the recommended configuration |
| Storage | 128GB UFS 3.1 |
| Connectivity | 5G, subject to network-band compatibility |
| Speakers | Stereo |
| Charging | 33W wired |
| Battery | 4,520mAh |
Advantages
- Excellent processor and graphics performance for the budget.
- Suitable for demanding games, multitasking, and supported emulation workloads.
- Smooth 120Hz AMOLED display with strong multimedia capabilities.
- Fast internal storage compared with many budget smartphones.
- Stereo speakers and 5G connectivity.
- Strong original hardware value when purchased at a reasonable used price.
Disadvantages
- The device is approximately five years old in 2026.
- Battery degradation is a significant consideration.
- Replaced displays, motherboard repairs, and other undisclosed defects can undermine its value.
- Official software-support longevity is inferior to that of a suitable newer device.
- An inexpensive listing may reflect damage or a non-original screen.
Assessment: The POCO F3 offers the strongest overall performance package among the three candidates. Its advantage depends on finding a healthy unit rather than merely locating the lowest advertised price.
3.2 Redmi Note 10 Pro — Camera and Multimedia Alternative
Configuration considered: 6GB or 8GB RAM, with 128GB storage where available
Purchase condition: Used
The Redmi Note 10 Pro focuses more on an all-round multimedia experience than on maximum processing power.
| Feature | Specification |
|---|---|
| Processor | Qualcomm Snapdragon 732G |
| GPU | Adreno 618 |
| Display | AMOLED |
| Refresh rate | 120Hz |
| Main camera | 108MP |
| Battery | 5,020mAh |
| Charging | 33W wired |
Advantages
- High-resolution primary camera.
- Smooth AMOLED display.
- Larger battery capacity than the POCO F3.
- Good multimedia features for everyday use.
Disadvantages
- Considerably weaker CPU and GPU performance than the Snapdragon 870.
- Used condition and battery health remain important.
- A fully functional unit may exceed the target budget.
Assessment: This is an appealing alternative for photography and everyday multimedia, but it is not the leading option for maximum performance.
3.3 Infinix Smart 9 — New-Phone Alternative
Configuration considered: 4GB RAM / 128GB storage
Indicative listed price: Approximately ৳11,999
The Infinix Smart 9 represents the new entry-level category. Its principal strengths are affordability, a relatively recent design, a large battery, and the possibility of purchasing a new unit.
| Feature | Specification |
|---|---|
| Processor | MediaTek Helio G81 |
| Display | 120Hz LCD |
| RAM | 4GB in the recommended configuration |
| Storage | 128GB |
| Battery | 5,000mAh |
| Purchase condition | New, subject to seller and stock verification |
Advantages
- New-device purchase option.
- Large battery capacity.
- Smooth advertised display refresh rate.
- Lower risk of inherited physical damage than an ordinary used handset.
- A practical option for routine communication and everyday applications.
Disadvantages
- Much weaker processing and graphics capabilities than the POCO F3.
- LCD display rather than the POCO F3's AMOLED panel.
- The exact warranty, stock status, and selling price must be confirmed before purchase.
Assessment: This is the preferred category for buyers who prioritize a new device over raw performance. Its principal disadvantage is the substantial performance gap compared with the POCO F3.
4. Performance Comparison
Historical AnTuTu 8 benchmark figures reported for the POCO F3 and Redmi Note 10 Pro are compared below.
| Smartphone | AnTuTu 8 score |
|---|---|
| POCO F3 | 631,850 |
| Redmi Note 10 Pro | 295,442 |
The POCO F3 scored approximately 2.14 times the Redmi Note 10 Pro's reported result in this benchmark.
These figures are historical results from AnTuTu 8, not current AnTuTu 11 scores. Benchmark results can vary with software, temperature, device condition, and testing methodology. They should be used as comparative evidence rather than as a guarantee of real-world performance.
The comparison nevertheless supports the POCO F3's position as the strongest performance-focused option in this shortlist.
5. Overall Comparison
| Category | POCO F3 | Redmi Note 10 Pro | Infinix Smart 9 |
|---|---|---|---|
| CPU/GPU performance | Excellent | Moderate | Entry-level |
| Display | 120Hz AMOLED | 120Hz AMOLED | 120Hz LCD |
| Camera emphasis | Good all-round capability | Stronger camera emphasis | Basic budget capability |
| Battery capacity | 4,520mAh | 5,020mAh | 5,000mAh |
| Storage performance | UFS 3.1 | Configuration-dependent | Configuration-dependent |
| Purchase condition | Used | Used | New, if stock is available |
| Long-term device age | Oldest concern | Older device | Newer device |
| Recommended role | Maximum performance | Camera and multimedia | New-device purchase |
Comparison result: The POCO F3 wins for maximum processing power and premium hardware value. The Redmi Note 10 Pro is a reasonable camera-focused alternative, while the Infinix Smart 9 is the practical option for buyers unwilling to purchase a used phone.
6. Risks and Pre-Purchase Verification
Because the recommended device is used, the condition of the individual handset is a critical part of the purchase decision.
6.1 Display Inspection
Check the screen against a white, black, red, green, and blue background. Test brightness, touch responsiveness, screen edges, and the full display surface.
Look for:
- Green or pink lines.
- Burn-in, discoloration, or dead pixels.
- Touchscreen dead zones.
- Excessive brightness inconsistency.
- Evidence of a replacement LCD or another non-original panel.
A non-original display may significantly reduce the quality advantage of the POCO F3.
6.2 Battery, Charging, and Motherboard
Test the phone while running a demanding game or benchmark. Observe excessive heating, sudden shutdowns, unexpected restarts, charging interruptions, and unusually rapid battery depletion.
Inspect the USB-C port and confirm that the charging connection is stable. Prefer a unit with no history of motherboard repair or serious liquid damage.
6.3 Network Registration and Identity
Dial *#06# to display the phone's IMEI number or numbers. Follow the current Bangladesh Telecommunication Regulatory Commission (BTRC) verification procedure to check network registration before paying.
Do not purchase a device with an altered, duplicated, blocked, or unverifiable IMEI.
6.4 Software and Account Locks
Confirm that the phone boots normally, receives a working mobile signal, connects to Wi-Fi, and can access the settings and update menus. Ask the seller to remove any existing account locks and verify that the handset can be reset and activated by its new owner.
6.5 Return Period
Purchase from a seller who permits thorough testing and, preferably, provides a written return or replacement period. A short testing opportunity is especially valuable when a used device has an ageing battery and uncertain repair history.
7. Budget and Buying Strategy
The purchase target for the POCO F3 is ৳11,000–৳12,000. This is a target range, not a guarantee that a suitable handset is currently available at that price.
A sensible buying strategy is to:
- Search local used-phone listings and reputable second-hand sellers.
- Compare several devices rather than choosing the lowest listing immediately.
- Confirm the exact RAM/storage configuration and whether the display is original.
- Test battery, charging, connectivity, cameras, speakers, and buttons.
- Verify device identity and network registration before payment.
- Walk away if the seller refuses basic checks or the handset has unexplained faults.
Any additional cost for repairs can eliminate the POCO F3's value advantage. Do not exceed the budget simply to obtain this particular model.
8. Sources and Evidence Notes
The initial research used the following source categories:
- Bikroy Bangladesh: Used-phone advertisements and indicative asking prices.
- GSMArena: Smartphone specifications and historical device information.
- Xiaomi device information: Manufacturer specifications and model details.
- BTRC / NEIR: Bangladesh mobile-device registration verification.
- Infinix Smart 9 specification listings: Entry-level specifications and indicative pricing.
References:
Prices, availability, and seller claims can change. The indicative prices in this report should be verified before any purchase, and historical benchmark results should not be confused with contemporary testing.
9. Final Recommendation
After comparing the three candidates, the recommended smartphone is:
POCO F3 — 6GB RAM / 128GB storage
Target price: ৳11,000–৳12,000
Purchase type: Used, thoroughly tested
Primary reason: Best overall combination of processor performance, GPU capabilities, display quality, and premium hardware in this shortlist.
The POCO F3 is the most compelling choice for a buyer whose highest priority is getting as much smartphone performance as possible for under US$100. Its Snapdragon 870 platform is the deciding advantage.
The recommendation comes with one essential condition: the phone must be fully functional, have a healthy battery, and preferably retain its original display. A damaged or poorly repaired POCO F3 is not a better purchase than a reliable alternative.
For anyone who strictly requires a new phone, the Infinix Smart 9 with 4GB RAM and 128GB storage is the alternative to investigate, subject to current availability and warranty confirmation.
Conclusion: For maximum performance within a US$100 budget in Bangladesh, the used POCO F3 is the first model to search for. Purchase condition and verified functionality should determine the final decision, not the model name alone.
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