Is iPhone 5s compatible for Jio VoLTE app?

The iPhone 5s is not natively compatible with VoLTE (Voice over LTE) due to the lack of support from Apple, despite the hardware capability of the Qualcomm MDM9615M LTE modem it uses.

Here are the key points:

• The iPhone 5s's hardware supports VoLTE, but Apple has not enabled this feature in any iOS updates134.
• To use a Jio SIM on an iPhone 5s, you need to rely on the Jio4GVoice app, which allows you to make and receive voice calls and send messages over the data network, as the phone itself does not support VoLTE35.

Therefore, while the iPhone 5s can use the Jio 4G LTE network for data, it requires the Jio4GVoice app to facilitate voice calls, rather than using native VoLTE capabilities.