Yes from a landline.They do work.

I have worked out it's theoritically possible to actually take out a new contract phone from "3" and MAKE MONEY from this system.

By using the 500 minutes a month, and not buying the top of the range mobile, you get alot of rebate of line rental.

Now by getting your own 0870 number, you could probably get between 2-3p per minute.

As it's already been established, 07744 are not included in 3's inclusive minutes.

However pre-dial's orange number is!!

Now, by using "3" to call landlines during the day, then you save up points.  You can save up even more, by using "3" to call freephone numbers, from the orange number.

When you have plenty of points, use them up, to call yourself on your 0870 number!!

Remember to be carefull, and not use over your 500 minutes a month.  Also bear in mind that minutes do not roll over, so get as close to possible to 500 minutes, without going over.

The rebate from your 0870 number should be more than the line rental.  Also, at the end you have a video phone, which could fetch some more money from ebay, or the classifieds in the local paper.

I have also heard of details of vodaphone's "stop the clock" promotion, where users can use their anytime minutes to call any mobile or landline for 60 minutes, and only pay for 3 minutes.

Haven't researched thoroughly enough yet, but surely another use of pre-dial's orange number is in order!!