---
title: Connect a Grandstream Phone to a Kenyan Number
description: >-
  Register a Grandstream GRP, GXP or DP desk phone to a Sautikit Kenyan number.
  The exact web UI fields, values to type, and fixes when it will not register.
summary: >-
  Put sip.sautikit.com:5080 in the Grandstream SIP Server field, your generated
  username in SIP User ID and SIP Authentication ID, the password, and set SIP
  Transport to UDP.
date: 2026-09-23T00:00:00.000Z
type: guide
---


## Summary

To use a Grandstream desk phone with a Kenyan number, claim a Sautikit number (KES 116/month including VAT), add a device under the number's **SIP & Devices** tab, then open the phone's web page and go to **Account → Account 1 → General Settings**. Set **SIP Server** to `sip.sautikit.com:5080`, **SIP User ID** and **SIP Authentication ID** to your generated username, **SIP Authentication Password** to the password, and **SIP Transport** to UDP. The phone registers within a minute and can make and take calls on that number.

## What you need

- **A Sautikit number.** KES 116 a month including VAT, no setup fee, live in seconds from the console or the API. Inbound calls are free; outbound calls cost KES 3.00 a minute, billed per second.
- **A Grandstream phone** on a network with internet access. This guide uses the web UI of the GRP26xx and GXP21xx series. DP series cordless systems use the same values in a slightly different layout (see [DP series cordless phones](#dp-series-cordless-phones)).
- **A computer on the same network** as the phone, to open its web page.

## Get your SIP details from Sautikit

In the [Sautikit console](https://app.sautikit.com), open **Numbers**, pick the number, go to the **SIP & Devices** tab and click **+ Add device**. Give it a label such as "Reception GRP2612". Sautikit shows you:

| Detail | Value |
|---|---|
| Server | `sip.sautikit.com` |
| Port | `5080` |
| Transport | UDP |
| Username | generated, for example `ep3f9a1c2b4d5e6f7a8b9c` |
| Password | generated |

If you close the window before copying the password, click **SIP setup** on the device's row to see the details again.

You can create the same credential with the API. The response carries `username`, `password`, `host`, `port`, `transport` and `realm`:

```bash
curl -s -X POST "https://api.sautikit.com/v1/numbers/$NUMBER_ID/sip-credentials" \
  -H "Authorization: Bearer $SAUTIKIT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"label": "Reception GRP2612"}'
```

## Grandstream settings

| Grandstream field | Value |
|---|---|
| Account Active | Yes |
| Account Name | Any name, for example `Sautikit` |
| SIP Server | `sip.sautikit.com:5080` |
| SIP User ID | your generated username |
| SIP Authentication ID | your generated username (the same value) |
| SIP Authentication Password | your generated password |
| Name | the name you want shown on the screen |
| SIP Transport | UDP |

The port matters more than anything else on this page. Grandstream phones assume port 5060 when you leave it out, and Sautikit listens on **5080**. Typing `sip.sautikit.com` without `:5080` is the most common reason a phone never registers.

## Steps on the phone

1. **Find the phone's IP address.** On a GRP26xx, press and hold the **Up** arrow for 3 seconds while the phone is idle. On other models, look in the phone's status or network menu.
2. **Open the web UI.** Type the IP address into a browser on the same network, for example `http://192.168.1.50`. Sign in as the admin user. The admin password is printed on the label under the phone on newer units; older units use the factory default.
3. **Go to Account → Account 1 → General Settings.** (On GXP21xx phones the menu reads **Accounts**.)
4. Set **Account Active** to **Yes**, then fill in **SIP Server**, **SIP User ID**, **SIP Authentication ID**, **SIP Authentication Password** and **Name** from the table above. Leave **Outbound Proxy** empty.
5. Click **Save and Apply**.
6. **Go to Account → Account 1 → SIP Settings → Basic Settings** and set **SIP Transport** to **UDP**. Click **Save and Apply** again.
7. **Check registration.** Open **Status → Account Status**. **SIP Registration** should show **Yes** on a green background. Grandstream recommends a reboot after configuration changes if it does not update.

### DP series cordless phones

DP DECT systems split the settings in two. Under **Profiles**, pick a profile, open **General Settings** and set **SIP Server** to `sip.sautikit.com:5080`; under that profile's **SIP Settings**, set **SIP Transport** to UDP. Then, in the base station's SIP account settings, set **Account Active** to **Yes**, choose that profile, and enter your username in **SIP User ID** and **Authenticate ID** and your password in the account's password field. Assign the account to the handsets that should ring. **Status → Account Status** shows **SIP Registration** as **YES** once it works.

## Make a test call

Dial your own mobile number from the phone in full international format, for example `+254712345678`. Your mobile should show your Sautikit number as the caller. Then call the Sautikit number from your mobile: the Grandstream should ring.

If you have two devices on the same workspace, you can give each one a four-digit internal extension when you add it and dial between them. Calls between two of your own registered devices are free.

## Troubleshooting

**SIP Registration stays at No.** Check the **SIP Server** field ends in `:5080` and **SIP Transport** is UDP. Then check the phone has internet access from the network it is plugged into.

**Registration fails with an authentication error.** The password was mistyped or copied with a space. In the Sautikit console, click **SIP setup** on the device's row, copy the password again and paste it into **SIP Authentication Password**. Make sure **SIP User ID** and **SIP Authentication ID** are both the generated username, not your phone number.

**It worked, then another phone stopped registering.** Each credential belongs to one device. If two phones share a username they fight over the registration. Add a separate device for each phone; the SIP & Devices tab shows how many devices the number has and its limit.

**Calls connect but there is no audio.** Some office routers rewrite SIP traffic (a feature usually called SIP ALG). Turn it off in the router and reboot the phone.

## FAQ

### Which Grandstream phones work with Sautikit?

Any Grandstream phone that registers with a SIP username and password, which includes the GRP, GXP and DP series. Sautikit does not certify individual models; if the phone has a SIP Server field and a password field, it can use a Sautikit number.

### Why port 5080 and not 5060?

Sautikit's SIP server listens on port 5080. Grandstream phones default to 5060, so you must add `:5080` to the SIP Server field. Without it the phone sends its registration to the wrong port and never gets an answer.

### Can I use more than one Grandstream phone on the same number?

Yes. Add one device per phone under the number's SIP & Devices tab, so each phone gets its own username and password. Each number has a device limit, shown on that tab.

### How much does it cost to run a Grandstream phone on Sautikit?

The number is KES 116 a month including VAT. Incoming calls are free. Outgoing calls are KES 3.00 a minute, billed per second from when the call connects. There is no setup fee.

### Can calls to the number reach my mobile when I am away from the desk?

Yes. Set the number to [forward calls](/developers/guides/forward-calls-and-voicemail) to one or more destinations, one after another or all at once, with voicemail if nobody answers. A registered desk phone can be one of those destinations by its internal extension.

## No desk phone? Use SautiKit Phone

If you do not have a handset, [SautiKit Phone](/phone) needs no SIP setup at all: sign in and your number works. It runs on the [web](https://phone.sautikit.com), [Android](https://play.google.com/store/apps/details?id=com.sautikit.phone) and [Windows](https://apps.microsoft.com/detail/9mxvnklz324k), with iOS and macOS in [beta on TestFlight](https://testflight.apple.com/join/sYaGFBDv).

Sources: Grandstream [GRP261x/GRP262x/GRP263x/GRP2670/GRP2650 Administration Guide](https://documentation.grandstream.com/knowledge-base/grp261x-grp262x-grp263x-series-administration-guide/), [GXP21xx Series Administration Guide](https://documentation.grandstream.com/knowledge-base/gxp21xx-series-administration-guide/) and [DP752 Administration Guide](https://documentation.grandstream.com/knowledge-base/dp752-administration-guide/), as of September 2026.