Itel P55 5G Network Problem Solution | Step-by-Step Signal Repair Guide (US/UK/Europe)

Описание: Learn the Itel P55 5G network problem solution with this complete hardware repair guide. This video covers SIM signal line testing, RF section checking, antenna connector cleaning, and baseband IC voltage measurement. Fix issues like no service, weak signal, or SIM not detecting easily using this step-by-step repair method. Ideal for technicians in US, UK, and Europe repairing mobile signal issues accurately.

⚙️ 30 Step-by-Step Instructions:

Power off your Itel P55 5G.

Remove the back cover gently.

Disconnect the battery flex.

Check SIM card for proper insertion.

Clean SIM tray with soft brush.

Use a known working SIM to test.

Check the SIM connector for bent pins.

Measure voltage at SIM VCC line.

Test SIM detection line continuity.

Inspect antenna connector placement.

Clean antenna terminal contacts.

Test RF section for signal output.

Check antenna switch IC for short.

Measure voltage at RF PA IC input.

Reflow antenna switch if needed.

Verify signal lines with schematic.

Replace damaged antenna wire.

Check baseband (modem) IC temperature.

Clean any corrosion around RF components.

Use jumper if antenna path is broken.

Reassemble motherboard carefully.

Power on and insert SIM again.

Check if network bars appear.

Perform signal search manually.

Enable and disable airplane mode.

Test call and internet connection.

If no signal, replace RF PA IC.

Recheck voltages after repair.

Confirm stable 4G/5G network signal.

Final test for both SIM slots.

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