The Telnyx SIM offers 4 IMSIs which are managed by a multi-IMSI applet on the SIM for global network coverage:
Telnyx
Sparkle
BICs
T-Mobile
US Cellular
Telnyx SIM: Manual IMSI Selection Instructions
The selection of which provider to use in each country is done automatically via logic on the SIM card itself however it is possible to manually select a specific IMSI as well.
Note: Manually changing the IMSI selection is NOT RECOMMENDED unless directed by the Telnyx Support Team.
Changing IMSI on Android Device
On Android devices, there will be an app called "Telnyx UICC" or "SIM Toolkit" that will appear when the Telnyx SIM is in use.
Step 1: Click on the SIM toolkit in the Installed Apps section.
Step 2: Click on Roaming Services
Step 3: Click on Select Mode
Step 4: Select Manual to see the list of IMSI's available
Step 5: Tap on the IMSI that you would like to set up with your Telnyx SIM
Once the desired IMSI is selected, the SIM can take up to a few minutes to change and establish a data session.
Changing IMSI on Apple Device
For Apple devices, you need to refer to the Screenshot Step by Step
Step 1: Select Settings
Step 2: Select Mobile Data and click on SIM Applications
Step 3: Select Telnyx on SIM Applications
Step 4: You will be presented with 2 Option
IMSI Selection Menu
Selection Mode
Option 1 - IMSI Selection Menu:
Here you can select different IMSI. If you see an asterisk (*) in front of the selected account, it means that a particular IMSI is active. (Sparkle IMSI - as per Screenshot)
If you are seeing connectivity issues with a particular IMSI, you can update it here.
Option 2 - Selection Mode:
You can set Automatic or Manual depending on the IMSI selection.
If you are manually updating the IMSI in Option 1 and wish for the SIM to boot up with the selected IMSI in Option 1, you must configure the selection mode as Manual.
Once the desired IMSI is selected, the SIM can take up to a few minutes to change and establish a data session.