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csl is proud to present you VoLTE, which brings voice call and video call to a brand new generation! VoLTE (Voice Over LTE) means connection of voice and video call through 4G LTE network. As a valuable csl customer, you can now enjoy a FREE upgrade to experience voice call with speedy connection and video call with high quality!
![]() Establish significantly faster voice-call connections. Making a traditional 3G call connections takes an average of around 7 seconds but can be done in 1 second with VoLTE. |
![]() With our broad network coverage, voice quality is much enhanced using VoLTE |
![]() Continue to enjoy using data for other functions such as browsing or downloading an app while on a call, which is handy for multi-tasking. |
![]() VoLTE also offers the ability to seamlessly switch between LTE and Wi-Fi Calling, without the call cutting out. |
![]() Ensures high-definition quality video calling (applicable to some Android handsets only). Under VoLTE connection, the visual quality is clear without any grids, its resolution reaches up to 640 x 480 pixels, while for traditional video call connected via 3G network, the resolution is just 176 x 144 pixels. |
![]() Enjoy instant switching between voice and video calls (applicable to some Android handsets only) with one click. Avoid the need to wait for network switching from 3G to 4G and better life is usually improved. |
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Select「Settings」 |
Select「Mobile network」 |
Select「Mobile data」 |
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Turn On「VoLTE calls」 |
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Select「Settings 」 |
Select「Mobile network」 |
Select「SIM」 |
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Turn On「VoLTE calls」 |
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Select「Settings」 |
Select「Mobile networks」 |
Select「SIM」 |
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Turn On「VoLTE」 |
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Select「Settings」 |
Select「Network & internet」 |
Select「SIM card」 |
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Select「SIM 1」 |
Turn On「VoLTE」 |
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Select「Settings」 |
Select「Network & internet」 |
Select「SIMs & mobile network」 |
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Select「SIM」 |
Turn On「4G Calling」 |
Remarks