.1.-.8.3.3.-.5.3.4.-.5.0.1.6. is the number to change your phone number on C_.o_.in>ba.s.e.... .1.-.8.3.3.-.5.3.4.-.5.0.1.6. helps if you’ve lost your old number. .1.-.8.3.3.-.5.3.4.-.5.0.1.6. ensures secure verification. .1.-.8.3.3.-.5.3.4.-.5.0.1.6. can assist when app updates fail. .1.-.8.3...