iPhone charging with Android adapter

Hi I’m Jabed Khan from Bangladesh.

is it harmful ? if i will continue to charging my iphone 6s plus by an android 5V adapter. It is Samsung Adapter,

actually my iPhone adapter doesn’t work properly. Maximum time on charging time it’s going to disconnect & shows a message that it’s not supported.

so I’m badly try to continue with Samsung adapter. Let me know it will be curse for my device or not.

thank you.