How to set data cap on Nighthawk M6 Pro

[RobWest]

I have three Telstra sim cards on a plan that allows data to be pooled.

Two phone sims with 250GB each, and a data only sim for the Nighthawk with 25GB. Combined, they give me 525GB data

The data only sim in my Nighthawk M6 Pro only has 25GB data. As such, it keeps telling me that I have exceeded my data cap after a few days use even though my data pool is 525GB.

How can I change this data limit from 25GB to say 500GB in the Nighthawk settings?

[JohnPeng]

For Telstra device, the data usage is pulled from Telstra data usage server based on the SIM card used. So it is not possible to combine 3 SIM cards' data unless they can be added up on the Telstra network side.

Thanks