I live in Bangladesh here is no Apple store what can I do if I want to replace iPhone battery please tell me

Just a quick question. Where was the iPhone purchased (I.e. authorized for sale in Bangladesh, gray market, etc.)?

It’s been my understanding that in some countries without access to Apple’s repair equipment, only complete replacement is an option, although at a reasonable price for the relevant service. But in that case a gray market iPhone will be ineligible.

These people say they are Authorized Apple Service Provider in Bangladesh --> http://www.icentre-bd.com/