Here are some steps to determine why your phone is not charging:

1. 
   

   Check the power outlet to make sure it is functioning properly.

2. 
   

   Check the cord to make sure it is not broken, frayed, or damaged.

3. 
   

   Check the USB port on the phone to make sure nothing is obstructing it.

4. 
   

   If the phone is still not charging, try installing a different adapter and cable.