One of the best things about a smart lock is that there are so many ways in — and if one ever fails, another always works. Whether you are a new owner or helping a family member, knowing how to unlock smart door lock the right way, including the backup methods, means you are never stuck at your own door. This guide covers every unlocking method on a modern smart door lock, from face recognition to the mechanical key.
Many ways to unlock, one secure door
A good smart lock gives every member of the household a way in that suits them, plus reliable backups for emergencies. Understanding how to unlock smart door lock across all these methods means everyone — from a tech-savvy teenager to a grandparent — can get in easily, and you are covered even if the power runs low. Covlor® locks typically offer face, fingerprint, PIN, card, app, mechanical key and USB-C power. The table below lists each method and how it works, and the sections below explain them in detail.
Every way to unlock a smart door lock
| Method | How it works |
|---|---|
| Face recognition | Approach; the door reads your face |
| Fingerprint | Touch the sensor |
| PIN / card | Enter code or tap card |
| App | Unlock remotely from your phone |
| Mechanical key | Concealed keyway backup |
| USB-C power | Power a flat lock with a power bank |
Face recognition
The most effortless way to unlock smart door lock models with a camera is simply to approach. 3D face recognition reads the geometry of your face and opens the door hands-free, with no touching or codes — ideal when your hands are full of shopping or children. Each household member enrols their face once in the app, and the lock recognises them from then on, even in changing light. Because matching happens on the device, it is fast and private. For most families, face recognition quickly becomes the default, everyday way in.
Fingerprint and card
Fingerprint entry is the classic keyless method: place your enrolled finger on the sensor and the door reads you in a moment. It is reliable, quick and perfect for all ages. For those who prefer not to use biometrics — or for guests and children — an RFID card or tag offers a simple tap-to-enter option. Both methods are enrolled and managed in the app, so you can add or remove a fingerprint or card in seconds. Together they give flexible, keyless access that suits different members of the household.
PIN code
A PIN is one of the most versatile ways to unlock smart door lock units, because it needs no enrolled biometric and can be shared. Enter your code on the keypad and the door opens. Anti-peep protection lets you pad the real PIN with random digits so an onlooker cannot memorise it. PINs are ideal for guests, helpers and deliveries: you can create a temporary code in the app and delete it when it is no longer needed. For many households, the keypad PIN is the dependable all-rounder that anyone can use.
App and remote unlock
Your phone is a powerful key. Through the Tuya / Smart Life app, you can unlock a Covlor® lock remotely — opening the door for a trusted visitor while you are away, or simply from the sofa. The app also lets you check whether the door is locked, share time-limited codes, and see an access log. Remote unlocking needs an internet connection, so it works wherever you have signal. This is how to unlock smart door lock models from a distance, and it is invaluable for letting in guests, cleaners or family when you are not home.
Backup: mechanical key and USB-C power
The methods that matter most in an emergency are the backups, and a good smart lock never leaves you without one. If the battery is flat, a concealed mechanical keyway lets you unlock the old-fashioned way — keep this emergency key somewhere safe but accessible. Covlor® locks also include an emergency USB-C port: connect any power bank or phone charger and the lock powers up instantly so you can unlock by your usual method. Knowing these two backups is the key to never being locked out, whatever happens with the battery or electronics.
Choosing a lock with the right methods
When buying, consider which unlocking methods your household will use, so everyone has an easy way in. The Covlor® CR L88, CR L99 and CR L108 offer the full set — face, palm, fingerprint, PIN, card, app, key and USB-C — while the CR L51 series and slim CR L45 cover the everyday essentials. More methods mean more flexibility and more backups. Whichever you choose, make sure it includes the mechanical-key and USB-C fallbacks, so you always know how to unlock smart door lock units even in a power emergency.
Setting up each unlock method
Getting the most from your lock means setting up each way in properly. Enrol each family member’s face and fingerprints through the app, capturing them carefully for reliable recognition. Create individual PINs so you can tell who entered, and register any RFID cards for guests or children. Pair the lock with the Tuya / Smart Life app to enable remote unlocking and notifications. Finally, make sure everyone knows where the emergency mechanical key is kept and how the USB-C backup works. Spending a few minutes on this setup means every household member has a method that suits them, and you have reliable backups ready. Knowing how to unlock smart door lock units every way starts with enrolling them correctly from the outset.
Which method suits whom
Different household members naturally prefer different ways in, and a good smart lock accommodates them all. Parents often love hands-free face recognition when arriving with bags or children. Teenagers tend to prefer a quick fingerprint. Younger children and elderly relatives may find a simple PIN or a tap card easiest. Guests and helpers are best given a temporary PIN that you delete afterwards. For letting someone in while you are away, the app’s remote unlock is ideal. Matching the method to the person makes the lock effortless for everyone, which is the whole point of having so many options. Understanding how to unlock smart door lock models in each way lets you tailor access to your family’s needs.
Safety tips for unlocking
A few sensible habits keep your keyless entry both convenient and secure. Use anti-peep padding when entering a PIN in a public corridor, so onlookers cannot memorise your code. Change shared guest PINs regularly and delete them once a visit is over. Keep the emergency mechanical key somewhere safe but not inside the locked home, and never leave it in an obvious hiding spot. If you enable voice unlocking, set a spoken PIN and be mindful of who is within earshot. These small precautions ensure that knowing how to unlock smart door lock units easily never comes at the expense of security, letting you enjoy keyless convenience with full peace of mind.
Teaching the whole household
A smart lock is only as convenient as the household’s familiarity with it, so take a few minutes to show everyone how to unlock smart door lock units in each way. Make sure every family member can use their enrolled face or fingerprint, knows their PIN, and understands where the emergency mechanical key is kept and how the USB-C backup works. For elderly relatives or children, pick the simplest reliable method and practise it together. It is also worth showing a trusted neighbour or relative the backup options in case they ever need to help. A household that knows all the methods and backups never gets caught out, which is exactly the confidence a well-set-up smart lock should provide.
Related guides
Keep exploring smart security on the Covlor® blog: smart door lock won’t unlock, battery dead backup access, and keyless entry for everyday access. You can also browse the full smart door locks collection or return to the Covlor® homepage. For background, see smart locks on Wikipedia.
Recommended Covlor® Models
Ready to upgrade? These Covlor® models suit the common door types and budgets: the CR L88 and CR L99 push-pull locks for premium main doors, the CR L51-S and CR L51-B for a sleek everyday front door, the slim CR L45 for apartments, and the feature-rich CR L108 — all with face, palm and fingerprint recognition plus a mechanical-key backup. Browse the full lineup on the smart door locks collection or the main shop.
Frequently Asked Questions
How do I unlock a smart door lock?
By any enrolled method — face recognition, fingerprint, PIN, card or the app. Backups include a concealed mechanical key and USB-C emergency power if the battery is flat.
How do I unlock it if the battery is dead?
Connect a power bank to the USB-C emergency port to wake the lock and unlock normally, or use the concealed mechanical key. You’re never locked out.
Can I unlock the door remotely?
Yes. The Tuya / Smart Life app lets you unlock from anywhere with an internet connection, and share time-limited codes with guests.
Which method is best for guests?
A temporary PIN is ideal — create it in the app and delete it when no longer needed, with no keys to hand over.
The takeaway
Knowing how to unlock smart door lock models every way — face, fingerprint, PIN, card, app, plus the mechanical-key and USB-C backups — means easy access for everyone and no risk of being locked out. Choose a lock with the methods your household needs. Explore Covlor®’s versatile smart door lock range.
