Last winter I received a return offer for a fulltime position at a company I did an internship at. Since the offer was great, I accepted it and signed it. However, due to changes in personal circumstances, I want to look for better opportunities. It is mainly because I would rather work in a different city.
What I am wondering is if I should let the companies I am applying to know about my current offer and the state of it (ie that I accepted it) when recruiters ask. On one hand, it would be useful for negotiations later if I reach that stage, but on the other, it may reflect poorly that I would be going back on my signed offer. If I don't bring it up or bring it up later, it could be seen as dishonest.
Note: this is in NA and for software positions.