Why lock SimRush to a certain LTE frequency band?
Locking to one LTE frequency band can help with getting a stable connection.
For example, sometimes SimRush will see multiple frequency bands and move between them. If one band provides a stronger signal than the other, locking the SimRush to that band will result in a more stable signal.
Bands also have different channel bandwidths which changes the capacity available on that band.
For example, Band 20 has a bandwidth of 5MHz whereas, Band 3 has 20MHz. You may choose to lock the SimRush to Band 3 in this case to avoid performance drops due to higher congestion on Band 20.