Nick,
Get back to the "wiggly ILS needle" for a moment....mine have been that way ever since I first started doing the things....and that was way before Cell Phones....heck...that was before touch tone phones....hell...that was before Princess phones! I would suggest some "wiggling" is good....confirms the needle isn't stuck or you haven't lost signal....and not got an off flag. Have I been doing something dangerous all these years? Tell me it ain't so?