Locking MM to 4g only

[Russ Westrem]

Im am trying to lock to 4g only.

  Modes    |      supported: 'allowed: 2g, 3g, 4g; preferred: none'
           |        current: 'allowed: 2g, 3g, 4g; preferred: none'



root at LEDE:~# mmcli -m 0 --set-allowed-modes=4g
error: couldn't set current modes:
'GDBus.Error:org.freedesktop.ModemManager1.Error.Core.Unsupported: Cannot
change modes: only one combination supported'
root at LEDE:~# mmcli -m 0 --set-preferred-mode=4g
error: setting preferred mode requires list of allowed modes
root at LEDE:~#
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