I changed my router to motorolla, then later on i wanted netgear back, but since motorolla disconnected me from netgear, how can i use my netgear back as my router?
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What part won't connect? You Netgear to your ISP or your device to your Netgear?
If it is the first, then you probably need to call your ISP and ask them to reset your connection so that they "forget" about your Motorola device and "learn" your Netgear.
If it is the latter, then you may just need to restart your client to pick up a new DHCP address.