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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Nokia > Nokia Hardware & Hardware Repair

Nokia Hardware & Hardware Repair all what you need for Hardware Repairing for Nokia Phones. Before writing any thread here try to check the Frequently Asked Questions Section.

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Old 04-15-2003, 18:35   #1 (permalink)
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5210 Sim card not Valid


Help me solve this problem man ....

first time came, phone dead, replaced Flash ok.

But now when insert sim (Working Sim) it says, "Sim card Not Valid"

Pls help me..

thx
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Old 04-16-2003, 00:15   #2 (permalink)
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:)

hi man
just unlock it
should work
bye
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Old 04-16-2003, 10:05   #3 (permalink)
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As mohammed said, first try to unlock it. Then try to full flash it and recalculate faid with KNOK.
Then read the full flash from your phone with KNOK. Compare this file with file you used for flashing. If they are not identical - change combo flash again.

If above is OK, then check contacts, check/replace V104, R124, R125, R128, C128, C127.

Check the Vsim (3V or 5V) at C128.
Check the Vsrm at C131 RF and V5V at C108.
Check the regulator N600, V116, C132 and C131.

If everything above is OK, than change the CCONT N100.
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Old 04-16-2003, 18:56   #4 (permalink)
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wow....

its unlocked already .... but ill try to compare the flash first.

thx 4 ur reply ...
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Old 04-17-2003, 09:52   #5 (permalink)
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Very good stuff Johny3310!!!
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Old 04-17-2003, 17:38   #6 (permalink)
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replaced new flashed ... then OK.

Thx guys
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