Yes, but you'll have to buy one yourself unless your's is still under warranty whereby PN will send you a replacement if you ask them. You'll probably have to initially file a fault.
Why do you need to reset it? Depending on your answer, it might be the case that he problem is not the router but something else. Are you ADSL or FTTC.
In another browser tab, login into the Plusnet user portal BEFORE clicking the fault & ticket links
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.
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