There are a couple of points of interest here.
Firstly SMS is not a GUARANTEED means of message delivery, it is "best effort". The insistance of companies using it as a primary contact mechanism and furthemore imposing time limits on the validity of the data is disgraceful.
Secondly, I can't find anything in Citibank's conditions that state the SMS reception availability is required. The only thing I have found is that an applicant for Citibank service must have a mobile telephone number.
Firstly SMS is not a GUARANTEED means of message delivery, it is "best effort". The insistance of companies using it as a primary contact mechanism and furthemore imposing time limits on the validity of the data is disgraceful.
Secondly, I can't find anything in Citibank's conditions that state the SMS reception availability is required. The only thing I have found is that an applicant for Citibank service must have a mobile telephone number.