Let People Call You With a Single Scan

No. Scanning it opens the phone’s dialer with your number already entered, but the person still has to tap the call button. This is intentional - phones never auto-dial from a QR code, since that would let a sticker placed over a poster trigger unwanted calls. It keeps the person in control.

Use full international format: a plus sign, your country code, then the number, with no spaces or dashes - for example +48 for Poland, +1 for the US, or +44 for the UK. Entering it this way means the code works no matter where the person scanning it is located.

No. Placing a call doesn’t require a data connection, so the code works even where signal is weak or Wi-Fi is unavailable - a basement bar, an underground car park, a rural site. This is one advantage it has over a website QR code, which needs a connection to load.

Not with a static code. The number is encoded directly into the pattern, so a new number means a new code. Before printing in bulk, point it at a line you’re confident you’ll keep. If you expect the number to change, route the code to a phone line that can forward calls instead.

A phone number QR code does one thing: it opens the dialer to call you. A vCard QR code saves a full contact - name, phone, email, company, website - to the person's address book. KoloQR builds phone, email and URL codes rather than vCards, so when you want people to keep your full details, point the code at a profile page - the usual setup on a business card.

Yes. Both open the tel: link in their built-in dialer, and neither needs a separate QR app on current versions. The two platforms handle formatting slightly differently, so it’s worth testing on one of each before a large print run.

Sometimes. Adding a comma after the number creates a short pause before extra digits are sent, which can reach a department extension. Support for this varies between phones, though, so a plain number is the most reliable choice. If an extension is essential, test it on the devices your audience is likely to use.

Not from the tel: code itself - dialing happens on the person’s phone, out of reach of any analytics. If you need to measure response, put a dedicated call-tracking number in the code and read the reports from that service. That tracking is set up with your phone provider, separately from the QR code.

A phone number code opens the dialer to place a call. An SMS QR code opens the messaging app with your number, and often a pre-written message, ready to send as a text. Use a call code when you want a conversation, and an SMS code when a quick written reply suits better - bookings, keywords, or opt-ins, for instance.

Yes. You can generate, customize, and download a phone number QR code for free, including PNG and SVG exports. The code doesn’t expire and there’s no sign-up, so a code you print today keeps working for as long as the number stays active.