5ghz isn't more stable.. in fact it has far worse penetration (lol) than 2.4ghz. In particular it doesn't like passing through walls etc. It does have the advantage of being able to maintain faster data rates and the 5ghz spectrum is generally less crowded than 2.4ghz. Bottom line, if your device is far away from your router, 2.4ghz will be a better choice.
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