In spite of several complaints regarding its coverage, 3 mobile has some real plus points that we are happy to write down for you. It is one of the very few mobile companies to offer unlimited data in 4g and tethering too. It offers free Wi-Fi on the underground and it also provides an SMS- alert system to advise you of your data usage. Please bear in mind that its 4g coverage is not the widest and it is also not one of the most powerful. Instead, most of its sim-only deals are quite cheap and attractive in what they offer.
It is worth taking a look.
3 Mobile | 12 months contract | 8GB in 4G | UNLIMITED minutes | UNLIMITED texts | 3 months free | £20 p/month
Network: ★★★ 3/5
Deals: ★★★★ 4/5
Cost: ★★★★★ 5/5