Few things you must keep in mind before stepping ahead towards the process of resetting your iPhone like is your device completely charged or not and second, is having a backup of your previous data because it might be important to you.
Make sure that you have completed the process of backup.
Now, these mentioned steps to reset your iPhone:
- At, first tap setting
- Go to general setting
- Tap the option of reset
- Then select the option of erasing all content and setting.
watch this videos and follow the steps as shown to reset your iPhone.
"hope it was helpful"