Unhappy [Q] Where is the antenna?

I had to open my atom life because the touchscreen wasn't responding.. And then I accidentally dropped the phone while I was trying to put the phone back together.

Everything still worked okay, apart from the network signal, which does not give anything, not even a single bar. Could someone help me pinpoint where the antenna is? I fear that it might have disconnected somehow when I dropped it, but I sincerely do not know where it is.

I really don't know what the problem is, and if you could suggest on what could be done, I'll gladly try it.

Thank you so much, and I hope you guys could help me with my problem.