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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Chinese Models & Cloned Phones

Chinese Models & Cloned Phones All China Phone Platforms like (MTK, Spreadtrum.. etc.) Cloned Nokia Nokla & Motorola . etc. Phones are included

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Old 12-23-2009, 09:52   #1 (permalink)
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Find Rx .tx Signles easyyy


Find Rx .tx Signles easyyy
Find Rx .tx Signles easyyy
HOW TO FIND RX .TX SIGNLES .

It is tasted and also you can test it.

1 step is, we need to find GND from phone.

2 step is, we should power on phone (operation with dead phone:
phone must be 100% dead by software)and take multimater put it to voltage.

3 multimeter (-) line put it GND and with (+) line check each connectors
, and usually Tx= 1.8v or 2.8v and Rx=1.7v or 2.7v
(it will be change by processor but strongly 1.7v or 2.8v not 3v or 4v)
This way is too easy and you will save a more time.

For example!
You have got new brand China miracle phone with USB cable. It has got
12 pin. You must find (Infinity team give good Idea 1.2.3 punkts):
1) GND usually it has got 2 GND. (now we have got 10 pins)
2) We will uncheck USB + and USB- (VSS) just with checking by USB cable (now we have 8 pins)
3) By USB cable we also uncheck V bat+, ac adaptor + polarization (now we have 7 pins)
4) Now from this 7 pins you will find 1 or 3 not used pins (last operation we have 3 or 6 pins to find Rx Tx signals)
5) Now at last operation you should use good multimeter just to find Rx Tx with 1.7v-2.7v or 1.8v-2.8v
6) WHEN PHONE IS POWERD OFF TX AND GND WITH MULTIMETER MAKING BEEEEEP
(DIOD TEST OPERATION), WHEN PHONE POWERED ON IT WILL SHOW LIKE DIOD
RESISTANS 600-700 OHM BETWIN TX AND GND.

I think I have give for every body more information’s. Just try to
find. If you find 2-3 phone signals and you will be profi mobile Tx and
Rx signals finder.
Some times you will not find with this method some phones, but why we have forum?

I'm not saying it is 100% solution but I'm saying it is TESTED solution.
I'll make some guide or FAQ by pic. if I have a free time!

By gopalhot
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Old 12-23-2009, 11:00   #2 (permalink)
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thanks brother _______________________
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Old 04-03-2010, 00:22   #3 (permalink)
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G581_pcb01_gprs_mt6225_s00.zzt_g581p03_5_7t18d0831 _mb01.bin
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Old 04-19-2010, 15:44   #4 (permalink)
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funny v10 rx tx tested....


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Old 04-19-2010, 15:45   #5 (permalink)
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funny v10 rx tx tested....


Yfrog - funnyv10rxtx
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Old 04-20-2010, 08:38   #6 (permalink)
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Quote:
Originally Posted by longowal View Post
funny v10 rx tx tested....


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Old 07-16-2011, 18:47   #7 (permalink)
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plz help me

Quote:
Originally Posted by MMDEBILI View Post

i have this lc c9 mobile but failed to find rx and tx plz tell me urgent
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