This happened to me too. I took it in to get the power button repaired (which turned out to be a problem with the motherboard) and came out with it not being able to hold a wifi connection and the vibrate broken. Useless!

I always tell people to invest in a good case. It will save you time and money in the long run and protect your phone.

Best case scenario is that the digitizer cable and wifi antennae aren't properly connected, which is an easy enough repair to make at home. I have the most experience with fixing iPhones, but the basic internal structure is pretty uniform amongst modern smartphones. The digitizer is what reads touch, and if it simply isn't connected, then the only thing you have to do is open the phone up and snap it back into place. I would recommend looking up a tutorial for this process, it's an easy fix, but those cables are delicate and if you damage the phone's brain then it's all over. If you have an iPhone, then you probably have two wifi antennae, one at the top of the phone, and one at the bottom. If they aren't connected, fixing it is a delicate but simple process. Just like the digitizer cable, all you have to do is snap them back into place. The same warnings apply though. Quite frankly, a cable connection test is something anybody with experience fixing phones should do before they close the phone up. If you find that they are connected properly, however, then the issue is unfortunately much more serious because it implies that either the cables have been damaged, or the phone's brain has. If that's the case, then pray it's just the cables because those can be replaced.

Take it make and demand a refund and that they pay for your phone to be repaired or for you to get a new one.

I'm assuming you have an iPhone. If you get the screen replaced on an iPhone you have to make sure they use the original home button. If they don't it does that. Assuming the place that replaced your screen doesn't have your old button still, you need to have your phone sent in to reprogram the home button

Go to a proper shop to fix i had the same problem with 2 ipads

I would sue them. I spend way too much time watching The People's Court and Judge Judy, and as long as you have evidence, you'll get a refund. (Assuming whoever fixed it won't give you one.)

Take it back, what's the big deal? Most repair shops give you a 30 day warranty.

Yep…same thing happened to me last year…except substitute the word "phone" for the words "laptop" and "geek squad"

Wait , how did u post this then ?