I just registered my account with the cell phone number 911, this is a required input.
The validation should not just check wether it is a number, but also wether it is a plausible number.
Better: Do not make this field requiered. Why do you need my cell phone number in the first place? Nothing in this forum can be that important, you need to contact me on my mobile phone.
In Germany we have the word “Datensparsamkeit”, which means you collect only the data, you really need to store.
My address in this account consists of dashes, here the validation is not that good either and could be left out.
P.S.: Still searching for a proper bug tracker.