Everything a new user needs: installing on iPhone or Android, reading the line buttons, making and managing calls, and what to do if something looks off.
A quick idea of how it works.
Guaranteed Contacts places your calls through your office phone system, so customers see your business name and number instead of "Scam Likely." You dial from your own phone and your own contacts.
You need three things: the app, a setup QR code from your office manager or telephone provider, and a phone with a camera. No QR code? You can type your line details in by hand — see Help.
Pick your phone. About two minutes.
Tap the App Store button above, or search "Guaranteed Contacts" and tap Get. Open it. A welcome screen offers Scan QR Code or Enter Manually.
Contacts lets you dial anyone with one tap. Camera is used only to scan your setup code. Guaranteed Contacts will never upload, share, or sell your contacts, and never records video or reads your photos.
Point the camera at the code. That sets up Line 1. If your office gave you more than one code, the app asks which line each belongs to.
The app confirms setup and drops you on Quick Dial, with your line lit green.
Type a number or tap a contact, then tap DIAL. The first time, a Password prompt note explains what's about to happen.
Tap the Google Play button above, or search "Guaranteed Contacts" and tap Install. Open it and choose Scan QR Code or Enter Manually.
Contacts lets you dial anyone with one tap. Camera is used only to scan your setup code.
Guaranteed Contacts places calls itself, so Android asks for phone access and to make it your Phone app while it is open. Android may show several prompts in a row — this is the only time you'll be asked. Your previous Phone app comes back when you leave.
Point the camera at the code. That sets up Line 1, and you land on Quick Dial with the line lit green.
Dial or tap a contact. Android shows Guaranteed Contacts' own call screen — mute, speaker, keypad, and office-phone controls like Park and Transfer.
You can open a tech support ticket without leaving the app. Please use it, early and often.
Tap the Settings tab at the bottom of the screen and tap the gold Contact Tech Support button.
Pick Dialing issue, Extension sync, Contacts or Something Else (which asks for a short subject). Then tell us what you did, what you expected, and what actually happened. The number you dialed, the line you used and the time of day are all useful.
Your name and email are remembered for next time. Tap Send to Support and wait for the Ticket Sent confirmation. If you leave the screen before sending, your draft is saved.
Some problems make the app ask you directly:
A ticket includes your message, your name and email, your line settings and when each line last synced, the app version and your phone type — plus the last dial log if you leave that box ticked. Guaranteed Contacts doesn't send your contacts, and nothing else leaves your phone. The app's privacy statement is linked right on the ticket form.
A "Ticket not sent" message usually means your phone has no connection. Your text is saved as a draft, so reconnect and tap Send to Support again. Still stuck? You can also open a ticket on the Cool Telecom website.
The row at the top of every screen is your whole phone system.
Selects it. The next call goes out through that line. An empty line opens setup instead.
Opens its options: rescan the QR code, edit by hand, or delete the line.
Flips Line 4 between Cell and your office line. Cell dials straight out on your own number — no office connection.
Five tabs along the bottom. Recent calls is one tap away on Quick Dial.
Type a number or extension; the name appears underneath. Seven digits? Your area code is added for you. Leave it empty and tap DIAL to connect to the office system.
Tap RECENT on Quick Dial. Calls placed, received and missed, plus numbers you dialed through the app. Tap any row to call back.
Your phone's own contacts. Tap one to call through the office. Tap the star to keep favorites handy.
Everyone in the office, in Desk and Cell tabs. Search, switch between list and grid, tap to call.
Pick up a parked call (71–76), or flip a call-flow switch like "Temporarily Closed" or "Inclement Weather."
Wallpaper, themes, text brightness, permissions, and a Contact Tech Support button that sends a ticket straight from the app.
Guaranteed Contacts' own call screen and office-phone controls.
Timer, who you're talking to, and Mute / Speaker / Keypad. PBX Functions and Parked sit below, and End Call at the bottom.
Park the call, transfer it to an extension or voicemail, or Hang Up + New Call for a fresh dial tone.
Ordinary calls to your phone number ring here too, with the contact's name and photo.
Line 4 can dial out on your own number for personal calls — no office connection, and nothing about the call is recorded.
The two phones handle calls differently.
| Feature | iPhone | Android |
|---|---|---|
| Scan a QR code to set up | ✓ | ✓ |
| Who places the call | The iPhone's Phone app | Guaranteed Contacts itself |
| Call screen | Standard iPhone call screen | Guaranteed Contacts' own, with mute / speaker / keypad |
| Office password prompt | You hear it — don't press digits | Handled for you (hold music plays while it connects) |
| Park / Transfer during a call | Use your office's usual codes | ✓ Built-in PBX Functions |
| Park pickup & call-flow buttons (PBX tab) | ✓ | ✓ |
| Cell line (Line 4) | ✓ | ✓ |
| Extra permission | — | Phone access / Phone app role |
⚑ Drafted from the v2.0.30 source; to be confirmed before launch.
Most problems are one of these.
Ask your office manager, or contact Cool Telecom support. You can enter your line by hand instead: tap Enter Manually on the welcome screen, or long-press a line and choose Edit Manually. You'll need the phone number (DID), feature code and PIN from your office.
That's the office system logging you in. On Android the app covers it with hold music; on iPhone, don't press any digits — your phone dials them for you. If the call keeps failing, the app offers Call Failed? → Extend all pause lengths, or rescan your QR code in case your PIN changed.
In the app, open Settings and tap the Contacts row under Permissions to jump to your phone's settings, allow Contacts, then reopen the app.
This only happens when installing from a file. Settings → Apps → Guaranteed Contacts → ⋮ → Allow restricted settings, then try again.
Download the file, open it, and allow "install from this source" when asked. Then follow the "Allow restricted settings" step above.
No. Guaranteed Contacts will never upload, share, or sell your contacts, and only dials when you tell it to.
Tap Contact Tech Support on the Settings tab to send a ticket straight from the app, or contact Cool Telecom.
Contact support