Despite being eligible both for Sierra Leone and Finland (having obtained its citizenship), Bantamoi never won a senior international cap, neither with the former country, nor with the latter. However, he received a call-up for the "Leone Stars" in 2014, when he featured on the bench in both the matches against Cameroon (on October 10 and 15, respectively), regarding the qualification round to the 2015 African Cup of Nations in Equatorial Guinea.