How do I delete photos off my iPhone 7 plus?

Ok so I'm in a bad situation right now. I can't delete any photos off my iPhone. I press the trash button but it just freezes or pops up again. I want to get my parents help but I have some pics of my girlfriend that I don't want my parents to see or know about. Any help would be great. I can't delete any of the photos I have.

Will my warrenty cover it?

I resently got my iphone 5 lcd fix at a local phone fix store but 3 days after that i dropped my phone and the screen and lcd broke again, putting it back to the same state before it was fixed. However i was given a 30 day warrenty with my purchase (its been a week since). Will my warrenty still cover my phone even if its my fault i dropped it and broke it again?

What is a GPP unlocked iPhone?

What is a GPP unlocked iPhone?

Added (1). Are these the phones that people buy from a courier in another country and leave with the phone without paying the total amount yet and use a gpp chip to enable the phone to support other couriers?

Why does my iPhone keep restarting? - 1

My phone keeps doing this thing where it restarts randomly. It will get more and more regular to the point where it just doesn't turn on at all and is completely unresponsive. I have had my phone replaced many times due to this problem and it still happens. I've been to the apple store where they told me its was to do with my software so i've changed my apple ID and reset my iPhone as a new iphone. It still does the same thing! All in all i have changed my sim card, changed my apple ID, not used an apple ID at all, deleted all my apps, restored the phone. I've tried everything i've been told to do and the problem STILL occurs? I will be going back to the apple store soon to see what they say but I was just wondering if anybody else had experienced this and what did they do? Anyone have any ideas what the problem could be? I'm starting to think its me?! I've had this problem since april and its getting ridiculous now, i can't live with an unreliable phone for the rest of my life, its dangerous and inconvenient. I need all the help i can get?