"We're aware there's been a network problem in your area since 23 January 2016. We're really sorry if this is affecting your services. We're doing all we can to fix the problem. We update this information every 30 minutes so please check for updates."

Wonder how long this will take?

I had one which lasted from May 2015 to around October 2015. I can't remember the exact dates but they'll be on another thread somewhere. Either way, it was the best part of 6 months. Seems to be Seat of yer pants with 3, whether its repaired in a few days or a few months.

Hopefully my experience was the exception rather than the norm.

If you're lucky, it will be fixed within 30 minutes. Or at most an hour or two. You'll probably also find that you're the winner of that £33M lottery ticket.

There's an area not too far from me which I've had problems with for months, and when visiting their coverage checker last week it had the same message as you posted, but the date it mentioned was some date in September or October 2015.

I've just checked and they've changed it now, it just says:

That's better. At least now it doesn't look as if takes months for them to fix problems, just an indeterminate "some time" which an optimistic person may consider to be no more than a day or two, or at most a week. They are doing all they can to fix it (make it right, hopefully), but again they can't give any timescale on when that is due to happen.

I must admit the old "We update this information every 30 minutes so please check for updates." on the old report for my area made me giggle, given how long the problem had existed.

In December 2015 I checked a postcode in Loughborough - "We're aware there's been a problem since 31 July 2015". Meanwhile I'm pulling 90Mb on EE 4G+ at the same place . Hopefully this isn't the norm for Three.

Anyway if you're literally getting no signal at all I'd imagine it'd be quicker, maybe 1-2 weeks but I'm guessing here.

I'm gonna guess Loughborough was only a 4G problem and that's why it took so long - we all know how much Three cares about 4G

Hahahaha yes I loved that too for my area