Is WR21 supports 2 cellular links active concurrently?

My digi router WR21 has 2 sim cards installed. One sim card configured as PPP1 and the other sim card is configured as PPP2. However, it seems like it only used the PPP1 link.

Is there anyway we can configure both mobile link active at the same time? Thanks in advance.

No, only one SIM or the other SIM on a WR21.

Modem can run on either one but not both concurrently.

Modem can be set to switch to other if SIM fails connection

I believe the WR64 is capable of running concurrent SIMS as it has 2 data cards with 4 SIM slots.