Should I let the 2.4GHz and 5GHz bands on my router use the same SSID?

My mom has an older single-band router. It worked just fine for her phone and tablet. She recently got a smart TV, and it doesn't work well with the 2.4 GHz signal. I'm going to set up a dual-band router for her soon. Should I configure it to have both bands use the same SSID, or should they each have their... show more My mom has an older single-band router. It worked just fine for her phone and tablet. She recently got a smart TV, and it doesn't work well with the 2.4 GHz signal. I'm going to set up a dual-band router for her soon. Should I configure it to have both bands use the same SSID, or should they each have their own.
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