This read-only object indicates the type of bearer as gbr, nonGbr, or unknown, where a GBR (Guaranteed Bit Rate) bearer reserves network resources whether or not they're actively used, while a non-GBR bearer serves best-effort traffic without consuming guaranteed resources. An administrator checks this to understand whether a given cellular data bearer has dedicated bandwidth guarantees or is subject to contention. For example, an engineer troubleshooting inconsistent throughput on a supposedly premium cellular connection would check this object to confirm the bearer is actually gbr rather than nonGbr.