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Let's say you're setting up RUTX14, which supports '''Carrier Aggregation''' of up to 3 bands, and you have two cell towers within a similar distance. Let's say Cell A transmits on bands 1, 7, and 20, while Cell B transmits on bands 3 and 20.
 
Let's say you're setting up RUTX14, which supports '''Carrier Aggregation''' of up to 3 bands, and you have two cell towers within a similar distance. Let's say Cell A transmits on bands 1, 7, and 20, while Cell B transmits on bands 3 and 20.
 
Since the signal from Cell B is a little stronger, the router will connect to two bands, and the bandwidth will be lower than using three bands. This means much lower speeds and reduced throughput.
 
Since the signal from Cell B is a little stronger, the router will connect to two bands, and the bandwidth will be lower than using three bands. This means much lower speeds and reduced throughput.
If we lock the router into only using Cell A, we might get a little worse signal, but much better speeds due to using 3 bands at the same time.
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If we lock the router into only using Cell A, we might get a little worse signal, but much better speeds due to using 3 bands at the same time.<br>
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[[File:Networking_Quectel_configuration_locking_cellids_on_devices_with_quectel_modems_topology_v1_700x.png|border|class=tlt-border]]
    
'''''Note: It is always recommended to use [[Band_Lock|Band Lock]] and only resort to Cell locking if Band Lock does not resolve the issue.'''''
 
'''''Note: It is always recommended to use [[Band_Lock|Band Lock]] and only resort to Cell locking if Band Lock does not resolve the issue.'''''