My battery health has gone down to 87% in just less than 6 months it shows that it is required to service the battery,
I got my iPhone from a shop located in Srilanka and they said that they do not guarantee the battery or replace my phone with a new one hence when I charge my iPhone to 100% it drops down to 20% without even using it for anything(maximum usage is 3hours or less), and as mentioned above I have 6 months left with the apple warranty so please let me know what I can do about with my iPhone because I have spent a lot of money on this device.
kindly help me regarding this matter,
Thank you