Or if you use prepaid SIMs which get deactivated after not upping their charge for 6 months, even if there's still money left on them. Using phone numbers - wh

Or if you use prepaid SIMs which get deactivated after not upping their charge for 6 months, even if there's still money left on them. Using phone numbers - which are, btw, free with prepaid SIMs - as identifier is dumb in general.