on 19-03-2015 08:03
Each company works differently. They all have good points. They all have bad points. If a service that tells you when your allowances are almost complete such as a text or email are deal breakers then you just choose a network that offers that.
O2 offer a wide range of options to allow you to see what you have left. O2 also offer a wide range of tariffs which in many cases offer unlimited minute and text allowances.
If you choose to take a capped tariff and you go over it you will be charged. That is the same wherever you go.
on 19-03-2015 08:08
So if you received a text to warn you that you were close to your allowance limit then you would be careful with calls and texts. This would tend to point to the over usage that happens isn't really necessary usage. Really, you do need to take responsibility and monitor your usage. It isn't difficult to open up my o2 at the end of each day to check.