Forgetting the password will mean you get to set it all up again.
And if you call it in, they should give you the same advice. Reset router and set it all up again.
I have purchased an iPhone and now realise I can not remember the password for our home wireless set up. We have a D-Link DSL-G604T and on checking the technical information it says about resetting to factory settings. I am worried that this will muck up all our current home set ups and this will impact our businesses. Any information on how to approach this as efficiently as possible would be appreciated. I usually get someone in for all technical support usually about once a year but would like to be able to do this myself (and get my i-phone working asap!) Thanks.