I’d like to add the mobile pay & go number of my son to my proximus account so I can follow up better. Unfortunately, when registering, the page keeps returning with a red box around the mobile number. (MyProximus → My account → Link your mobile numbers to MyProximus → Mobile number/enter the numbers you see in the ...)

Note: I had to call the helpdesk to active the SIM number, as it returned an error saying “This is not a valid pay and go numbers” - I tried on both IE and Chrome on a 3 year old laptop

PS: It’s good that you support 3 languages on your website, but it would be great if you could follow 1, instead of randomly switching between 3.