You won’t be allowed to upgrade or downgrade your system for the duration of your agreement. If you have already got a data SIM and want to subscribe to Business WiFi, you’ll really need to deactivate your present SIM first, then activate Business WiFi on a different one. Roaming minutes https://etisalat-internet-for-off89001.dbblog.net/3388332/the-basic-principles-of-du-business-internet-399