Is this Three’s secret weapon to destroy broadband landline?

Three introduced a 12-month SIM only version of its "The One Plan" SIM for £15 per month earlier this month and it may well be what many have been waiting for to switch off their landline services permanently. Think about it, at £15, this offer is as cheap as most landlines from the likes of Virgin Media, BT, TalkTalk or Sky.

What's more, this one includes 2,000 minutes, 5,000 texts, 5,000 minutes to Three customers, unlimited data and perhaps more importantly unlimited tethering. Fixed landline operators are likely to charge you much more for such a package especially as the minutes can be spent on landline and mobile phones as well.

Three currently delivers 3G but it has announced that it will upgrade its network to 4G by the end of the year. With that in mind, Three's TOP is a once-in-a-lifetime opportunity is far better than the rest of the competition, again, assuming that you are operating in a Three-covered area.

What's even more incredible is that it undercuts even Three's own data-only mobile broadband plans and not only provides with much more for a bit cheaper but also locks you in for a shorter period and you can use your unlimited data allowance in Europe for £5 a day (albeit without tethering).

The cheapest compatible 3G smartphone that allows tethering is the Alcatel One Touch OT-903. It runs Android 2.3 Gingerbread and comes with a number of entry level features like a small screen, a 2-megapixel camera and a microSD camera. All in all, Three has pulled out an awe-inspiring coup that will leave both mobile and fixed broadband operators seething.