My situation is simlar to yous in that mysteriously I can now connect today.  I did cycle power on the microcell though, so I can't say that I did nothing on my end .  Although I had done that before with no success.  The only issue I notice now is that the phones don't automatically switch to the microcell when entering the house, we have to manually do the airline mode thing but they always now do now seem to find the m-cell when we do.