Go into the settings and change the mobile Internet there is an access point, namely, select the type of authentication "PAP" (potential security problems on your conscience), and in the "Channel" prescribes "the LTE" or "4G". After this speed has risen almost 2 times. But that's not all. Need to go to the information about the phone (to get there, you need to dial dialer's this number: * # * # 4636 # * # *), and there is need to adjust the preferred type of network, namely to choose «LTE / WCDMA». You select this setting, save everything, reboot the phone, and speed have increased by about 3 times. She, of course, floats depending on the current network load, which is usually associated with the time of day, that is the Internet faster at night than during the day, for example. Here there is still an important point. On some phones that do not support 4G, this option is still there, and if you select it, the Internet in general will cease to work. In addition, Tele2, not being the nicest operator is not in all the villages and villages had introduced 4G. Therefore, keep in mind that this setting - Advanced. Not in all cases it is necessary, it does not always give a plus, but in some cases it can further enhance the speed, in this case 3 times the original. And, yet again, in some cases, after a reboot, this setting is reset for some reason. So maybe it is necessary each time to stand and do not restart the phone. Nevertheless, several measurements carried out indicate that, due to the settings, the speed is increased, that is, it was higher than it was before the setting changes. And Tele2 mobile internet as a whole becomes more stable.