VoLTE (Voice over LTE) is essential for the ONSiM service. It allows your phone to make high-quality voice calls over the 4G/LTE network rather than dropping down to older, less reliable frequencies.
Important: If VoLTE is disabled, outgoing calls will fail to connect, and all incoming calls will go straight to voicemail. You must re-enable this setting if you factory reset your device or reset your network settings.
Please click on your handset type below to be taken to the correct steps:
- Apple iPhone (Multiple Sims on Device)
- Apple iPhone (Only Sim on Device)
- Samsung Galaxy *
- Google Pixel *
*On Android devices, the settings and operating systems vary slightly from one model to another. Below you'll find the most common settings to enable VoLTE.
Apple iPhone (Multiple Sims on Device)
- Go to Settings
- Mobile Data/ Mobile Service
- Under "SIMs" tap Onsim Sim
- Tap Voice & Data.
- Tap the VoLTE toggle to turn it on.
Apple iPhone (Only Sim on Device)
- Go to Settings
- Mobile Data / Mobile Service
- Mobile Data Options
- Tap Voice & Data.
- Tap the VoLTE toggle to turn it on.
Samsung Galaxy
- Go to Settings
- Tap Connections
- Mobile networks.
- Tap the VoLTE calls toggle to turn it on.
Google Pixel
- Go to Settings
- Select network and internet
- Select Internet
- Select the settings cog next to the relevant SIM
-
Turn on the VOLTE slider, change preferred network type to LTE,
Still having trouble?
On some Android models, the VoLTE toggle may be hidden or named differently (e.g., "Enhanced 4G LTE Mode"). If you cannot find the setting, please refer to our Supported Device List to ensure your handset is compatible with our network carrier files.