Changed service from Verizon to Consumer Cellular. Obtained new number. Can text to contacts that existed in phone before changing carriers but cannot text to new contacts I added.gin carrier

Changed service from Verizon to Consumer Cellular. Obtained new number. Can text to contacts that existed in phone before changing carriers but cannot text to new contacts I added since"switching to Consumer Cellular. Error: "+1 (1) (216) 116-11 Invalid Number:Please resend using a valid 10 digit mobile number or valid short code."