Ok, so you're talking about 3G/4G mobile data, right? And are you saying that you're able to use it as a mobile hotspot for others to connect to, but you can't access the web on the phone itself?
Are you sure your M2 supports the 3G/4G bands that TELE2 uses? What's the exact model number of the phone (as shown in Settings>About Phone)? And what country are you using TELE2 in?