> For the complete documentation index, see [llms.txt](https://docs.monogoto.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.monogoto.io/faq/how-to-manually-change-a-sim-profile-using-a-smartphone.md).

# How to Manually Change a SIM Profile Using a Smartphone?

In some cases, a SIM may remain on a profile that is not functioning correctly. A common troubleshooting step is to manually switch the SIM to a different profile using the SIM menu on a smartphone.

This can be done using the SIM Toolkit (STK) on Android devices or the SIM Applications menu on iOS devices. The instructions below outline the steps for each operating system.

### IMSI Prefix to Profile Mapping

The first six digits of the IMSI identify the profile:

* 295050 – Profile E
* 311588 – Profile U
* 24007 – Profile B
* 234106 – Profile O

### Android Devices

When using a Monogoto SIM in an Android device, the MTK applet automatically installs a SIM Toolkit application on the phone.

#### Accessing the SIM Toolkit

1. Open the app search on your Android device.
2. Search for SIM.
3. Open SIM Toolkit or SIM Menu.

<figure><img src="/files/Yt34Ksn6W16wf5hqymJ9" alt="" width="252"><figcaption></figcaption></figure>

#### Changing the Profile

1. Open the SIM menu.
2. Select Mono.

<figure><img src="/files/e2Bbx7VQBIIc2XNpyeML" alt="" width="252"><figcaption></figcaption></figure>

3. You will see the following options:&#x20;
   1. Profiles
   2. Params
   3. Service Normal

<figure><img src="/files/g0sh4ic5UNSXWkY7C3ot" alt="" width="252"><figcaption></figcaption></figure>

4. Select Profiles to view the available IMSIs on the SIM.

<figure><img src="/files/rkTqHSrHLaPatqrfhzFC" alt="" width="252"><figcaption></figcaption></figure>

5. Compare the listed IMSIs with the information shown in the Monogoto Hub to determine which profile you should switch to.
6. The currently active IMSI is indicated by a star (\*) next to it.
7. Select the desired IMSI to change the active profile.

### Apple (iOS) Devices

On iPhones, the SIM menu is accessed through the device settings.

#### Accessing the SIM Menu

1. Select Cellular.

<figure><img src="/files/PTqp0m3ONOjQubVGWeNM" alt="" width="313"><figcaption></figcaption></figure>

2. Tap SIM Applications.

<figure><img src="/files/NYlgougejyYKtaC7i30U" alt="" width="313"><figcaption></figcaption></figure>

2. Select Mono.

<figure><img src="/files/sIuOJq7dau9qN5cneCMj" alt="" width="313"><figcaption></figcaption></figure>

#### Changing the Profile

1. After selecting Mono, you will see:
   1. Profiles
   2. Params
   3. Service Normal

<figure><img src="/files/0oIE6ALCjdDv41X1Di7g" alt="" width="313"><figcaption></figcaption></figure>

2. Select Profiles to view the available IMSIs.
3. The active IMSI will have a star (\*) next to it.

<figure><img src="/files/Mvn8qU0u0rRb7LfWqwSh" alt="" width="313"><figcaption></figcaption></figure>

4. Select the desired IMSI to switch the SIM profile.

{% hint style="info" %}
Always confirm the correct IMSI/profile to use by referencing the Monogoto Hub before making changes.

After switching profiles, allow the device a few minutes to re-register on the network.
{% endhint %}

<br>