Xiaomi Mi A3 - no LTE network found

[dodosaurus]

Hello,
I have a Xiaomi mi A3 with a broken screen. After replacing it with a new one (with frame) the phone was no longer able to connect to 4g (lte) network - only connects to Edge. My question is - where is the 4g lte antennas on the phone, so that I can check where the connection is not making contact.

[DerDat]

Hello,
I have a Xiaomi mi A3 with a broken screen. After replacing it with a new one (with frame) the phone was no longer able to connect to 4g (lte) network - only connects to Edge. My question is - where is the 4g lte antennas on the phone, so that I can check where the connection is not making contact.

Strange behavior. The antenna should be the same module and antenna. Hope can find the solution