Absolutely - forget India, let Dada show some phones made in West Bengal.
Say what - you don't have anything? Why - you guys are expert at building castles in the sky, could have built a few cellphone factories while you were at it.
দুইদিনের বৈরাগী, ভাতেরে কয় অন্ন।
Amateur trolling attempt by noobs.
Bangladeshis were vigorously using Motorola phones installed in cars in the 80's when India had no cellphone network (and no cellphones) to speak of even. Indians didn't even start using them until they got cheap enough.
Indians came to Dhaka in the late 90's with cellphone-network proposal thinking they could sell us one by 'Dalali'. Then Citycell-owner Murshed Khan told them to march back to New Delhi because we already had 70% coverage by all networks in Bangladesh.
And for your information - these phones are everyman phones made for common people on the streets. In Bangladesh even rickshaw pullers have had cellphones since the 90's. First bring a made-in-India cellphone (not cobbled together from Chinese components) then come talk.
Do you know what a FAB is and how much it costs to set up one? You have any idea what is involved?
ফ্যাব কি গাছে ধরে? Do FABs grow on trees?
Even India does not have one, in spite of its 1 plus Billion people market (forget about the lone research one you have, it doesn't commercially produce anything). Your companies are reluctant to invest in one. Because most of them are basically fly-by-night outfits out to make a quick buck, even the Ambanis.
If it takes a GSM chip then the only carrier it might work in - is TMobile. Those TMobile phones do take GSM chips and some people have taken these to Bangladesh and used them AFAIK.