Bars only mean the strength of the signal, not the bandwidth available to you. You still connect to a specific node and that node can only handle so much traffic and not all nodes are created equal. So you can have a strong connection to a node but that node may be overwhelmed. If you’re away from large populations, that node isn’t going to be top of the line or have as broad a pipe into the network.
And this is all assuming that your provider isn’t throttling your connection or whatever you’re connecting to isn’t having issues.
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