Bijoy Phone is a Bangladeshi fixed line operator.
It is a private public switched telephone network (PSTN) operator in Bangladesh.
[1] Bijoy Phone has obtained license from Bangladesh Telecommunication Regulatory Commission (BTRC) to provide fixed phone services in the Northeast part of Bangladesh.
605 is the access code for Bijoy Phone as allocated by the Government of Bangladesh.
Omitting +880 will require to use 0 in place of it instead to represent local call, hence 0605 is the general access code.