# 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.

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#### Changing the Profile

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

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

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

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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.

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2. Tap SIM Applications.

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2. Select Mono.

<figure><img src="https://3922449203-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M0mPxGpottOEfcucXOR%2Fuploads%2FgRlEO8K0DeXx9iz4Czel%2Fimage.png?alt=media&#x26;token=0be3440a-edfc-4d11-99ca-d2127415b095" 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="https://3922449203-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M0mPxGpottOEfcucXOR%2Fuploads%2F4JGNgWfxBWYSk45tWe9k%2Fimage.png?alt=media&#x26;token=43b7bf6d-93b9-479c-93ce-5e2ffedd6e77" 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="https://3922449203-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M0mPxGpottOEfcucXOR%2Fuploads%2FEUBwRRsQcAhWOEleq70C%2Fimage.png?alt=media&#x26;token=517f3055-3d87-40df-8392-9e422c66aef1" 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 %}

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