Infinix Smart 9 Network Problem Solution | No Service | Emergency Only | Network Ways & Jumper

In this video, we provide the complete hardware repair solution for Infinix Smart 9 network problem, including no service, emergency calls only, weak signal, SIM network not registering, network IC issues, RF section testing, antenna jumper, and SIM network pathways. Perfect for mobile repair technicians.

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📌 30 Step-by-Step Repair Guide

Power off phone and remove back cover.

Remove battery connector.

Inspect SIM tray area.

Clean SIM slot with IPA.

Check SIM pins for corrosion.

Check SIM detection by multimeter.

Test SIM lines continuity.

Check SIM IC area.

Clean RF section.

Test antenna connector.

Tighten antenna pad contact.

Check antenna cable.

Replace antenna cable if broken.

Check antenna coil continuity.

Replace coil if open.

Check antenna filter.

Replace if faulty.

Test network PA (Power Amplifier).

Check RF IC temperature.

Reflow RF IC carefully.

Check baseband section.

Test voltage on RF lines.

Check EMI shield area.

Remove shorted capacitor.

Check PMIC network output.

Test network bands.

Reassemble and test network.

Insert SIM and reboot.

Check signal stability.

Final hardware verification.

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