OPPO F21 Pro – 8/128GB (Pre-owned)

oppo f21 pro

Oppo F21 Pro mobile was launched on 12th April 2022. The phone comes with a 90 Hz refresh rate 6.43-inch display offering a resolution of 1080×2400 pixels (FHD) at a pixel density of 409 pixels per inch (ppi) and an aspect ratio of 20:9. The display sports Gorilla Glass for protection. Oppo F21 Pro is powered by an octa-core Qualcomm Snapdragon 680 processor. It comes with 8GB of RAM. The Oppo F21 Pro runs Android 12 and is powered by a 4500mAh battery.

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Product Details:

The OPPO F21 Pro is a feature-rich mid-range smartphone that blends sleek design with capable hardware, catering to users who seek both style and performance. Released in April 2022, it comes in two variants: a 4G model and a 5G model, each tailored to different user needs. This comprehensive overview delves into the specifications, features, and pricing of the OPPO F21 Pro, providing insights for potential buyers and tech enthusiasts.

Design and Build

The OPPO F21 Pro boasts a slim and lightweight design, measuring approximately 159.9 x 73.2 x 7.5 mm and weighing around 175 grams. Its ergonomic build ensures comfortable handling, while the premium finish adds a touch of elegance. The device is available in eye-catching colors such as Sunset Orange and Cosmic Black, with the Sunset Orange variant featuring a unique fiberglass-leather design that offers a distinctive texture and appearance. Additionally, the phone has an IPX4 rating, providing resistance against water splashes.(MobileDokan, GSMArena)

Display

The OPPO F21 Pro features a 6.43-inch AMOLED display with a resolution of 1080 x 2400 pixels, delivering sharp and vibrant visuals. The screen supports a 90Hz refresh rate, ensuring smooth scrolling and an enhanced viewing experience. With a peak brightness of up to 800 nits, the display remains legible even under bright sunlight. The screen is protected by Gorilla Glass 5, offering durability against scratches and minor impacts.

Performance and Hardware

OPPO F21 Pro 4G

Under the hood, the 4G variant is powered by the Qualcomm Snapdragon 680 chipset, built on a 6nm process. This octa-core processor comprises four Kryo 265 Gold cores clocked at 2.4 GHz and four Kryo 265 Silver cores at 1.9 GHz, delivering efficient performance for everyday tasks. The Adreno 610 GPU handles graphics-intensive applications, ensuring smooth gameplay and media consumption.

OPPO F21 Pro 5G

The 5G variant is equipped with the Qualcomm Snapdragon 695 chipset, also built on a 6nm process. This processor includes two Kryo 660 Gold cores at 2.2 GHz and six Kryo 660 Silver cores at 1.7 GHz, providing enhanced performance and 5G connectivity. The Adreno 619 GPU offers improved graphics rendering, catering to users who demand higher performance levels.

Both variants come with 8GB of LPDDR4x RAM and 128GB of UFS 2.2 internal storage. The storage is expandable via a microSD card slot, allowing users to increase capacity as needed. Additionally, OPPO’s RAM Expansion technology enables the use of up to 5GB of additional virtual RAM, enhancing multitasking capabilities.

Camera Capabilities

Rear Camera

The OPPO F21 Pro features a versatile triple-camera setup on the rear:

• 64 MP primary sensor with an f/1.7 aperture, delivering high-resolution images with excellent detail.
• 2 MP microscope lens with an f/3.3 aperture, offering up to 30x magnification for capturing intricate details.
• 2 MP depth sensor with an f/2.4 aperture, assisting in creating bokeh effects for portrait shots.

This camera system supports various features, including LED flash, HDR, and panorama modes. The rear camera is capable of recording 1080p videos at 30 frames per second, ensuring smooth and clear video capture.

Front Camera

For selfies and video calls, the device is equipped with a 32 MP front-facing camera with an f/2.4 aperture. This camera supports HDR and can record 1080p videos at 30 frames per second, delivering sharp and vibrant self-portraits.

Battery Life

The OPPO F21 Pro houses a 4500 mAh non-removable lithium-polymer battery, providing ample power for a full day’s use. It supports 33W SuperVOOC fast charging, allowing the battery to reach 100% charge in approximately 60 minutes. This rapid charging capability ensures minimal downtime and keeps users connected throughout the day.

Software and User Interface

Running on ColorOS 12.1 based on Android 12, the OPPO F21 Pro offers a user-friendly interface with a host of customization options. The operating system includes features such as FlexDrop for multitasking, Three-Finger Translate powered by Google Lens, and enhanced privacy controls. These features contribute to a seamless and personalized user experience.

Connectivity and Network Support

The OPPO F21 Pro supports dual SIM functionality, allowing users to manage two phone numbers simultaneously. The 4G variant provides connectivity through GSM, HSPA, and LTE networks, while the 5G variant adds support for 5G networks, ensuring faster data speeds and improved connectivity.

Additional connectivity features include:

• Wi-Fi: 802.11 a/b/g/n/ac, dual-band
• Bluetooth: 5.1 with A2DP, LE, and aptX HD
• GPS: Supports A-GPS, GLONASS, BDS, GALILEO, and QZSS
• USB: Type-C 2.0 with OTG support

The device also includes a 3.5mm headphone jack, catering to users who prefer wired audio accessories.

Security and Sensors

For security, the OPPO F21 Pro incorporates an under-display optical fingerprint sensor and supports face unlock, providing quick and secure access to the device. It is equipped with various sensors, including an accelerometer, gyroscope, proximity sensor, and compass, enhancing the overall user experience with responsive and adaptive functionalities.(Deep Specs)

The OPPO F21 Pro stands out as a well-rounded smartphone in the mid-range segment, offering a blend of modern design, reliable performance, and comprehensive features. Its AMOLED display, capable camera system, and efficient battery life make it a compelling choice for users seeking value without compromising on essential functionalities. Whether opting for the 4G or 5G variant, users can expect a device that meets the demands of everyday use with style and efficiency.

How to Take Care of Your Mobile Phone in Daily Life: A Comprehensive Guide

In today’s digital era, mobile phones are not just devices; they are essential tools for communication, work, entertainment, and even personal organization. Given the critical role they play, taking care of your smartphone is more important than ever. Proper care ensures longevity, optimal performance, and a better user experience. This guide outlines comprehensive and practical tips on how to maintain and use your phone daily, and concludes with insights into both the advantages and disadvantages of mobile phone usage.

Use a Protective Case and Screen Protector:
One of the first things every mobile phone owner should do is invest in a high-quality protective case and a screen protector. These accessories are not just aesthetic; they are crucial for physical protection. Cases can absorb shock from accidental drops, while tempered glass protectors can prevent cracks and scratches on your screen.

Keep It Clean:
Phones accumulate dirt, dust, and bacteria quickly because they are handled frequently. Clean your phone regularly with a microfiber cloth and a gentle cleaner. Avoid using water or harsh chemicals. For ports and speakers, use a soft brush or compressed air to remove debris without damaging the components.

Avoid Overcharging:
Leaving your phone plugged in overnight or constantly charging it can shorten battery lifespan. Try to keep your battery level between 20% and 80%. Modern smartphones come with battery optimization features; enable them to preserve battery health.

Manage Apps and Storage
Unnecessary apps and large files can slow down your phone and take up precious storage. Periodically go through your apps and media files, deleting those you no longer need. Use cloud storage or external backups for photos and videos.

Use Trusted Chargers:
Always use certified and compatible charging cables and adapters. Cheap, uncertified chargers can damage your battery or even pose safety hazards. Using original or high-quality third-party accessories is essential for your device’s health.

Keep Software Updated:
Mobile phone manufacturers release regular software updates to improve performance, fix bugs, and patch security vulnerabilities. Enable automatic updates or check manually to ensure your phone is always running the latest version of its OS and apps.

Avoid Extreme Temperatures:
Smartphones are sensitive to temperature changes. Exposure to excessive heat can damage the battery, while extreme cold can temporarily shorten battery life. Avoid leaving your phone in direct sunlight or inside a car on a hot day. Similarly, don’t use your phone in freezing conditions for extended periods.

Secure Your Device:
Use password protection, fingerprint recognition, or facial recognition to secure your phone. Additionally, install a reputable security app to guard against malware and theft. Always be cautious when downloading apps and avoid clicking on suspicious links.

Handle With Care:
Avoid placing your phone in your back pocket, as sitting down can exert pressure and cause bending. Also, be cautious when placing your phone on hard or uneven surfaces. Always handle your device with care to prevent mechanical damage.

Use Battery Saving Features:
Enable battery saver mode when your battery is low or when you won’t have access to a charger for a while. Reduce screen brightness, disable background data usage for unnecessary apps, and turn off location services when not needed.

Backup Data Regularly:
Your phone stores valuable data like contacts, messages, and personal files. Back up your data regularly to the cloud or a computer to avoid loss due to theft, damage, or malfunction. Most phones offer built-in backup solutions; take advantage of them.

Avoid Water and Moisture:
Even if your phone claims to be water-resistant, prolonged exposure to water or high humidity can be damaging. Avoid using your phone in the rain or while swimming. If it gets wet, dry it immediately and avoid using it until completely dry.

Turn Off When Not in Use:
Restarting your phone regularly helps clear temporary files and refresh system performance. Additionally, consider turning off your phone during extended periods of non-use, such as overnight or while attending long meetings.

Important Tips From Usedbd:

1. Organize Your Home Screen and Settings: A cluttered home screen can slow you down. Organize your apps into folders and place frequently used ones on your main screen. Customize settings like notifications, Do Not Disturb mode, and shortcuts to suit your daily usage.

2. Optimize Connectivity Settings: Turn off Wi-Fi, Bluetooth, and GPS when not in use to save battery and reduce potential security risks. These features can be easily toggled on/off from your notification panel.

3. Monitor Device Health: Many phones come with built-in diagnostics or third-party apps that monitor device health, including battery condition, storage, and temperature. Use these tools to catch potential issues early.

4. Use Airplane Mode When Needed: If you’re in an area with weak signals, switch to airplane mode to save battery and prevent the phone from constantly searching for a network. This is also a good practice when charging your phone to speed up the process.

5. Practice Safe Browsing and Downloading: Be cautious about the websites you visit and the files you download. Avoid suspicious pop-ups, unknown sources, and insecure public Wi-Fi networks. These practices help prevent malware and phishing attacks.

6. Limit App Permissions: Check and manage app permissions regularly. Avoid granting unnecessary access to your location, contacts, camera, or microphone to apps that don’t need it. This not only preserves privacy but also conserves system resources.

7. Educate Yourself and Others: Stay updated on best practices for mobile phone care and share this knowledge with family and friends, especially children and elderly users who may be more prone to misuse.

The Pros and Cons of Smartphone Use: A Complete Guide

In the modern digital world, smartphones are indispensable. Whether for communication, entertainment, navigation, or work, mobile phones have evolved into essential tools that shape the way we live. However, with great utility comes significant impact—both positive and negative. This comprehensive blog will delve into the advantages and disadvantages of smartphones, offering insights into their role in our daily lives. We will also provide practical examples, list helpful points, and include recommendations to encourage balanced and mindful usage.

## Advantages of Smartphone Usage

1. Constant Connectivity:
Smartphones make it possible to stay connected at all times. Whether you’re on the go or across continents, communication is just a tap away. Messaging apps, video calls, and social media have transformed the way people maintain relationships.

2. Access to Information:
The internet is a treasure trove of knowledge, and smartphones provide instant access. From news updates to research articles, tutorials, and videos, learning is easier than ever. Students, professionals, and even hobbyists benefit from this real-time information access.

3. Improved Productivity:
Smartphones help streamline work processes. With apps for calendars, task lists, file sharing, and remote meetings, working from anywhere has become a reality. Time management tools and note-taking apps allow better organization and planning.

4. Entertainment at Your Fingertips:
Whether it’s streaming your favorite series, listening to music, playing games, or reading eBooks, smartphones are entertainment hubs. This is particularly helpful during commutes or while waiting in lines.

5. Navigation and Travel Assistance:
With GPS capabilities and apps like Google Maps, Waze, or City mapper, navigating unfamiliar places is now hassle-free. Travelers can also access translation tools, book rides, and explore local attractions effortlessly.

6. Health Monitoring and Fitness Tracking:
Modern smartphones come equipped with health monitoring features and support fitness apps. They track steps, monitor heart rate, and even suggest workouts, promoting a healthier lifestyle.

7. Emergency and Safety:
Having a smartphone during emergencies can be life-saving. Features like location sharing, SOS calling, and access to emergency contacts make smartphones essential for personal safety.

8. Financial Transactions and Online Shopping:
Mobile banking, digital wallets, and e-commerce apps simplify transactions. People can pay bills, transfer money, and shop online with minimal effort.

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## Disadvantages of Smartphone Usage

1. Digital Addiction:
One of the most significant downsides is dependency. The addictive nature of smartphones, driven by social media and gaming, can lead to excessive screen time and decreased productivity.

2. Physical Health Concerns:
Prolonged use can cause eyestrain, sleep disorders due to blue light exposure, and postural issues like “tech neck.” Many users overlook these effects until they become serious.

3. Reduced Attention Span:
Notifications, pop-ups, and constant switching between apps contribute to reduced focus. It becomes harder to concentrate on tasks or hold extended conversations.

4. Data Privacy and Security Risks:
Smartphones store sensitive information, making them targets for hackers. Phishing scams, malware, and data breaches are constant threats. Users need to be cautious about app permissions and suspicious links.

5. Social Disconnection:
Ironically, while smartphones connect us digitally, they can distance us socially. Overuse often leads to neglecting face-to-face interactions and weakening real-world relationships.

6. Financial Costs:
High-end smartphones are expensive, and maintaining them involves recurring costs—such as data plans, subscriptions, and accessory purchases.

Tips for Responsible Smartphone Use

To balance the pros and cons, adopting a mindful approach to smartphone use is key. Here are some helpful tips:

• Set Usage Limits: Use built-in features like screen time tracking to monitor and reduce usage.
• Turn Off Non-Essential Notifications: Only allow important alerts to prevent distraction.
• Create Phone-Free Zones: Establish spaces like dining areas or bedrooms where phone use is discouraged.
• Take Breaks: Follow the 20-20-20 rule—every 20 minutes, look at something 20 feet away for 20 seconds to reduce eye strain.
• Use Airplane Mode During Focused Tasks: Temporarily disable notifications while studying or working.
• Update Security Features Regularly: Use antivirus software, enable 2FA, and keep apps up to date.
• Avoid Late-Night Usage: The blue light from screens can disrupt sleep cycles. Use night mode or stop usage an hour before bed.
• Educate Children: Teach younger users about the safe and healthy use of smartphones.

Summary Table: The Good and the Bad

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