Top 5 Unlocking Methods in Modern Smart Locks

Smart locks have completely changed the way we think about home security. Gone are the days of fumbling for keys or worrying if you locked the door behind you. With smart locks, we're gaining more control, more convenience, and more peace of mind. But here's the thing: not all unlocking methods are created equal. The method you choose affects not only how secure your home is but also how smoothly your daily routine runs. In 2025, these devices offer multiple unlocking methods, each catering to different lifestyles and security needs. Whether you prioritize convenience, speed, or advanced technology, choosing the right unlocking method is crucial.

As someone who has tested various smart locks, I've found that Philips offers reliable options for different use cases. Below, I break down the top five unlocking methods, their pros and cons, and which Philips models work best for each.

1. Keypad/PIN Code Entry

One of the most widely used smart lock access methods is PIN code entry. This system lets you input a personalized 4–8 digit code on a touchscreen keypad to unlock your door.

You don't need to carry a key or worry about losing it. Many models even let you create temporary codes for guests, babysitters, or Airbnb tenants. According to a 2024 Statista report, over 40% of U.S. smart lock users prefer keypad entry because of its simplicity and shareability.

Some models, like the Philips 1000 Series Touchscreen Electronic Deadbolt (DDL210-12H), feature a sleek touchscreen for easy code entry.

Pros:

✔ No keys needed: Never worry about losing or duplicating keys.

✔ Shareable access: Give temporary codes to guests, cleaners, or renters.

✔ Reliable in all conditions: Unlike biometrics, it works even with wet or dirty hands.

Cons:

❌ Risk of code sharing: If someone shares the code, security is compromised.

❌ Shoulder surfing: Someone could peek at your code if you're not careful.

Best for: Families with kids, short-term rental hosts, and homeowners who value convenience over high-tech features.

If you want an affordable, no-frills smart lock, Philips 1000 Series Touchscreen Electronic Deadbolt offers PIN code entry only with a sleek touchscreen. No keys to carry. No fuss.

2. Fingerprint Scanner

Biometric unlocking has quickly become a favorite among tech-forward homeowners. It lets you unlock the door with a quick tap of your fingertip—no keys, no codes.

A fingerprint sensor scans your unique print and grants access instantly. The Philips 1000 Series Key-Free Fingerprint Deadbolt (DDL210-13H) combines fingerprint and PIN entry for extra security. According to research by MarketsandMarkets, fingerprint-based locks are projected to grow by over 15% annually through 2027 due to increasing demand for fast and secure access.

Pros:

✔ Ultra-fast entry: No fumbling with keys or codes.

✔ Highly secure: Unique to each user, reducing unauthorized access.

✔ No physical keys needed: Eliminates lock-picking risks.

Cons:

❌ May struggle with wet/dirty fingers: Requires a clean, dry fingerprint.

❌ Less reliable for elderly or children: Some scanners struggle with faint fingerprints.

Best for: Tech-savvy users, couples, small households, and people who want fast entry after a long day.

The Philips 1000 Series Key-Free Fingerprint Deadbolt (DDL210-13H) recognize prints in under a second.

3. Mechanical Key Override

Sometimes, the old-school way is still the best backup. Mechanical key override is exactly what it sounds like: a traditional key that lets you unlock your smart lock manually if all else fails.

Even with all the latest tech, many smart locks include a hidden keyhole as a fail-safe.Many smart locks, like the Philips 1000 Series Fingerprint Touchscreen Deadbolt (DDL210-1H), offer multiple unlocking methods, this model supports both fingerprint and PIN code access, and also includes a traditional keyhole for emergencies.

Pros:

✔ Emergency access: Works during power outages or dead batteries.

✔ No tech required: Perfect for older users or non-tech-savvy family members.

✔ Reliable backup: Never locked out due to fingerprint/PIN failures.

Cons:

❌ Potential security risk: If the key is lost or duplicated.

During power outages or battery failure, you need a foolproof way to get in. For elderly users or those uncomfortable with digital devices, this offers much-needed peace of mind.

Best for: Families who want a backup plan, multi-generational households, or people who aren't 100% ready to go all-digital.

1000 Series Fingerprint Touchscreen Electronic Deadbolt (DDL210-1H), this one hits all the right notes offering fingerprint access, PIN code, and a mechanical key backup. It's one of my top picks for those who want high tech with a trusted fallback.

4. App Control via Smartphone

With a lock connected via Bluetooth or Wi-Fi, you can lock and unlock your door from your smartphone. Many apps let you check access logs, set up guest access, and even get notifications when someone comes or goes. Philips 4000 Series Smart Deadbolt with advanced fingerprint + app control for tech-savvy homes. Some even integrate with Google Home or Alexa.

Pros:

✔ Remote access: Let in guests or service workers from anywhere.

✔ Temporary access: Generate time-limited codes for visitors.

✔ Activity logs: Track who enters and exits your home.

Cons:

❌ Smartphone dependency: No phone? No entry.

❌ Connectivity issues: Weak Wi-Fi/Bluetooth can cause delays.

Best for: Frequent travelers, busy households, tech enthusiasts, and Airbnb hosts.

Philips 4000 Series Smart Deadbolt, this model takes it up a notch with app control, advanced fingerprint tech, and more. It's perfect if you love smart home integration and want control at your fingertips.

5. Palm Recognition (The Future of Biometrics)

Now we're talking next-level security. Palm recognition is one of the newest and most advanced unlocking methods in the smart lock world. It's touchless, ultra-precise, and honestly feels a bit like something out of a sci-fi movie.

The most secure smart locks like the Philips 5000 Series Palm Recognition Lock scan vein patterns in your palm, nearly impossible to fake.

Pros:

✔ Ultra-secure: Harder to spoof than fingerprints.

✔ Contactless: Great for hygiene-conscious users.

✔ Works for all ages: No issues with faint fingerprints (ideal for kids/elderly).

Cons:

❌ Higher cost: Premium security comes at a price.

❌ Limited availability: Still emerging in 2025.

Best for: Health-conscious users, households with young children and elderly family members, or anyone who wants futuristic tech that's both secure and inclusive.

Philips 5000 Series Palm Recognition Lock is cutting-edge offering high-end security that's ideal for families of all ages. If you're ready to future-proof your front door, this is it.

How to Choose the Right Unlocking Method

Choosing the best unlocking method isn’t one-size-fits-all. You’ve got to think about who’s using the lock, how often, and how comfortable everyone is with technology.

Ask yourself:

• How many people need access?
• Do you want remote control while traveling?
• Will kids or seniors be using the lock?
• Do you need backup in case of power loss?

My tip: Combine multiple unlocking methods for the best experience. For example, use app control when you’re away, fingerprint or PIN when you’re home, and always have a key override just in case.

Look for smart locks that offer 2–3 access options in one unit like those from Philips. Flexibility is key to both convenience and security.

Ready to Upgrade Your Front Door?

Smart locks have evolved far beyond simple key replacements, they're now customizable security solutions tailored to how you live. Whether you prioritize speed (fingerprint), convenience (app control), or fail-safe access (mechanical keys), there's an option that fits.

For busy professionals, fingerprint or app-based entry saves time. Families benefit from shareable PINs, while tech enthusiasts may prefer cutting-edge palm recognition. And let's not forget the timeless reliability of a physical key backup because even in our digital age, sometimes analog works best.

Need a reliable smart lock? Explore Philips’range, whether you want basic keyless entry (1000 Series), app control (4000 Series), or ultra-secure palm recognition (5000 Series).