How does the Round Robin bonding mode work in the M4?

In the “Round Robin” bonding mode, all SIM cards are “forced” to use the same network bandwidth. The disadvantage of round robin is that if one of the SIM cards has a low bandwidth it will reduce the overall bandwidth. The round robin mode is limited by the speed of the SIM card with the worst bandwidth. If, for example, 4 cards are used, each with a bandwidth of 10 Mbit / s, 8 Mbit / s, 6 Mbit / s and 3 Mbit / s, the transmission speed of each card is standardized to 3 Mbit / s. The total speed is then 12 Mbit / s.