phone number verification issue

I live in Bangladesh. so was trying to verify my phone number as my country is listed in drop down list. But showing some error regarding SMS.

country - Bangladesh & carrier - Robi

Which message you receive exactly?

Thanks!

I live in India and if I tried my
Phone misunderstood I would not receive the text message and if I tried my American number it says blocked help pls.

Hello , i’m from bangladesh and can’t receive sms from gameflip , my carrier Grameenphone and robi and Skitto and my invite code Q67149 and i got error [HTTP 400] 21408 : Unable to create record Permission to send an SMS has not been enabled for the region indicated by the ‘To’ number: +8801303025627
This number phone carrier is Skitto , please resolve my problem