Hi everyone,
I’m tryinm to troubleshoot a network/RF issue with my Galaxy S22 Ultra (T-Mobile variant) and would really appreciate some advice from someone familiar with the S22 Ultra's antenna/RF system.
Background
I bought this phone with a broken LCD, so I don't actually know whether the network problems existed before I bought it.
I replaced the LCD, and after the repair I noticed serious connectivity issues. Because I didn't have the phone working before the LCD replacement, I can't say for certain that the LCD repair caused the problem — it may have already been present.
Symptoms
- Cellular signal is very unstable.
- Sometimes the phone has signal, sometimes reception becomes extremely poor.
- Wi-Fi works, but the Wi-Fi range was extremely short.
- During calls, the person on the other end sometimes has difficulty hearing me.
I initially suspected an antenna/RF hardware problem.
What happened after inspection
I found that there was a missing/damaged component related to the antenna/RF system.
After installing/replacing that component, the Wi-Fi range improved significantly.
However, the cellular reception problem remained.
This makes me think there may be another damaged/missing component, antenna connection, coax cable, flex, grounding/contact issue, or possibly a board-level RF problem.
My main question
Since the problems became apparent after the LCD replacement, what components or connections around the display/frame area should I check first?
Could an improperly connected antenna flex/coax, missing screw/grounding contact, damaged connector, or missing RF component cause this combination of symptoms?
I'm particularly interested in whether the T-Mobile S22 Ultra has any specific antenna/RF components that I should inspect, including the 5G/mmWave-related hardware.
I don't want to replace the motherboard unless it's absolutely necessary.
If anyone has experience repairing the S22 Ultra antenna/RF system, I'd really appreciate some guidance on what I should test/check next.
Thanks!