Don’t use O2 mobile software. just use USB modem with dialup networking

What a crapy O2 software  which will spoil  all your wifi  connections home page and proxy setting etc. I like to keep things simple

so here is the setting after connecting the sim card to the modem just plug it in let windows install it as  a modem

go to network connections click create new connections give a name eg O2 PayG  select the correct usb modem O2’s case HUAWEI mobile connect 3G modem

on the number column type :-  *99#
user name put O2web
password just password

click finish,  make sure don\’t make it a default connection (unless you want that to be)

then open your browser  type https://mobilebroadbandaccess.o2.co.uk/index/products enter the phone no of the sim (which will be on the sticker of the sim card)  buy the credit and enjoy.

This setting will work with linux macs and any ver of windows (if their is driver support)