Help Center

Before you use Dual SIM with your device, please make sure to check that your device model supports dual SIM options.

• Most smartphones will only support 2 active SIMs simultaneously.
• Depending on the device model, you may be able to use 1 Physical SIM + 1 eSIM or 2 eSIMs
• For iPhones: Some iPhone Models manufactured for international markets may support 2 physical SIMs only.

1. Dual SIM with iPhone
Go to Settings > Cellular. Under the SIMs section, you will see a list of all SIM profiles currently on your device and you can manage your SIM profiles.

• a. SIM Labels
  When first installing your second SIM, your iPhone will prompt you to label each line. Default options include "Primary," "Secondary," "Cellular Data," and "Business." You can also create a Custom Label; we recommend labeling your Tello eSIM as "Tello" to avoid confusion.
• b. Default Voice Line
  Choose which number your phone uses by default for outgoing calls.
• c. Cellular Data Selection
  Select which SIM you want to use for your internet connection.
• d. iMessage & Messages
  To select the preferred line for iMessage and SMS:
  • Go to Settings » Apps » Messages » With iMessage On, tap Send & Receive.
  • Select the phone number you wish to use. This line will be used for iMessage, SMS, MMS, and RCS.

Note: You must be logged into an Apple ID to use these features. For further assistance with iMessage, please refer to Apple Support.

2. Dual SIM with Android

• Samsung
  • Go to Settings » Connections » SIM Manager.
  • Here, you can toggle specific SIMs On or Off.
  • The "Primary SIM" setting determines the default line for calls, data, and SMS services.
  • Select the Tello eSIM to enable Tello services as your primary connection.
  
  ✅ Tip: On many Samsung models, you can also swipe down the Quick Settings panel to quickly switch between your data lines.


• Pixel and Other Android Devices
  
  • Open the Settings app> Tap Network & Internet> then tap SIMs.
  • To access the internet via your Tello plan, ensure Mobile Data is turned On.
  • Under Preferences, choose your default SIM for each specific service (Calls, Data, or SMS). You can select a different line for each specific service.
  • Make sure the Tello eSIM is selected for the services you wish to use with Tello.
  • Note: Only one SIM can be the default for mobile data at a time. If you already have a data SIM active, you will receive a notification when switching to the Tello eSIM.