According to my contract, I have the option to change tariff after the 6th month.
Red Internet & Phone 1000 Cable: Price 1st to 6th month only 19.99 euros, download up to 1000 Mbit / s and upload up to 50 Mbit / s. I want to Change it to 100 Mbit/s.
How do I do that? it is not possible to do in the portal. Please guide me.
