JioFi is considered the best device for the Jio network but it does not have or support the feature of carrier aggregation. JioFi connects to a single band at a time with no aggregation.
So, is it good or bad for a mobile router?
First, understand why carrier aggregation is so useful. Carrier aggregation in a device helps to offer more bandwidth and faster data speeds by combining different network bands and dedicating it to a single user. In the real-world scenario, the same thing cannot be achieved all the time but rarely.
This feature helps in getting usable speed when all the bands are slow.
Since JioFi is used as a mobile router which is known as a stable mobile network, this feature isn’t useful at all. The main reason is unstable connectivity due to frequent connection and disconnection.