Windows 10: Why am I unable to add my Bangladeshi +880 phone number? 'We don't support that country...

Hello,I'm encountering an issue when trying to add my Bangladeshi phone number +880 to my Microsoft account. Upon attempting, I receive the following error message:'We don't support that country code. Use an email instead.'Steps I've taken to resolve the issue:Tried multiple carriers: Banglalink, Grameenphone, Airtel, TeletalkUsed different devices and browsersAttempted using a VPN to change my IP locationDespite these efforts, the problem persists. This limitation poses challenges in account security and accessibility for users in Bangladesh. I would appreciate guidance on:The rationale

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My Phone Update Phone Number - Country Not Listed

I am trying to update my My Phone account settings, but having clicked on the "update" link next to the picture of my phone I am unable to input my mobile phone number as my country (and therefore the country code) is not listed. Can this list be updated,
or is there a way to enter a number that is not listed under the country options? My country code (for the Falkland Islands) is: 00 500

 

N73 don´t show the contactname, only the number.

My N73 started displaying numbers only (no name) for some incoming calls for which I'm certain there was only one contact listing. It also sometimes displayed the number with the country code 614nnnnnnnn and sometimes not 04nnnnnnnn for the same caller
on the same network. So I tried to save the different number under the same contact name (the suggested option) but that has not helped and from what I read here may make it worse.

But I maintain that the phone was already having those problems before.

I will try sifting through the contact details and removing any duplicate numbers.

Any suggestions on a permanent solution?

 

Supported phones for Windows 10 Mobile Insider Preview Mobile

Your list confirms my phone is eligible, Lumia 521. The windows Insider App fails after ~ 15 seconds, restores data and gives me error 80073cf9. I trouble shot this and went thru all the steps mentioned on several websites including MS without any luck. Short of a hard reset, this is where I am now. Suggestions appreciated.