Backdoor via image

I got an image from a hacker via text massage and I opened it but didn’t download the image. Will the backdoor installed in my phone ??

No one can tell you whether something was installed on your phone just by reading this message. If you think something is installed then try looking for unnecessary apps in the Apps Manager in Settings. There are many malicious apps that take the name of some harmless apps or services. Do look which apps are taking more resources that shouldn’t be taking that much resource. The last thing that you can do is to factory reset your phone.

Okay .Thanks