Should I upgrade to 5ghz?
Should I upgrade to 5ghz?
It really depends on your device. If your phone only supports 2.4 GHz, upgrading to 5 GHz might not improve performance unless the new modem also works at 2.4 GHz. You could keep the existing modem and use a separate wireless router, connecting them via an Ethernet cable—let the newer router manage the wireless tasks while the modem translates Ethernet to the ISP’s protocol.
You're using an outdated modem, which is why your ISP should supply a newer one at minimal expense. Ghz mainly affects speed, but the real improvement comes from a modem or router that supports AC/Ax standards. This boosts performance as long as your phone can handle those protocols. What you're referring to is common and has been around for a long time.