Samsung SM-A127F Service Manual page 26

5. Disassembly and Assembly
5-3-8. Rear TOP & BTM Rear Assembly
Step 1
[Main Board]
Step 2
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Assemble the BTM manually.
※ When attaching the BTM ANT ASSY to the front, secure the
top part first.
※ Check the Coaxial cable and assemble it before assembling
the BTM ANT ASSY.
Assemble the TOP ANT manually.