I have problems with my modem, motorola SB6121, it doesn't matter which Router connects, the internet fails, the speed is infinitely lower than the contracted one. I do a speed test from any device connected to the Router and it is very low. If I remove the router. and I do the volucity test connected directly to the motorola modem, the speed is what I expect. why? I have changed the router, TPLink, Cisco, any brand happens the same, so I say that they can not be a problem for all those routers. It must be something of the modem. For some reason the speed of the internet is impaired. I turn off, turn on, set factory settings, delete keys, change channels, frequency, I don't know what to do anymore. Anyone know what might be happening?
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