Hi,
I dont think its normal to keep calling me with this number +31614094100 and asking me my personal information. If im the one who call you, you can ask me that personal info for verification but not the other way around.
My mobile contract almost expire and i have cheap sim only subscription, i plan to extend it and no way you can go any cheaper than that. I already got nice offer via email anyway.
My point is what you guys doing is bad security practice. I think sales try to conclude contract agreement via verbal communication which is legal in Netherlands but thats not how it should be. Something is not right in tmobile ict management.
Sorry for the rant, i mean you called me at 8pm and thats your 4th call, the 3rd one i answer which is why i know that you ask my personal info.