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Message: <blockquote data-quote="laal" data-source="post: 10454559" data-attributes="member: 94459">All Common Problem Solution For China PhoneFirst we need to know why a phone is dead- 1. For Software 2. For  Hardware   1. For Software- Flash is its final solution, but mtk cpu 90% phone    done by format. if its MTK,SPD,AD, SI4904 cpu first try to format than    try to full flash your phone with a good and perfect flash file. and    other cpu haven't format option, so direct flash them. when you flash    careful about original flash file version.  A. what you do  before  format or flash- Always remember,  before format or flash of your any   china phone must first backup your  current flash file if phone is   dead, also do it. because it will help to  find its original flash file   version and many other.  B.  What you need for flash or format a  china phone- (1) Connecting  device  (also your can do it with usb to serial cable but a device/box  can give  you full/final solution)  (2) Phone  TX and RX. (3) Need to know phone  cpu type/model,  flash chip type/model, Flash file version. (4) For Flash need a good flash file  which  same to your phone original flash file version.   C. What problem you  face for wrong  flash file (1) phone still dead (2)  white screen (3) keypad not work (4) phone hang after power on (5) keep restarting (6)  no network (7) etc.  <a href="http://rapidshare.com/files/129822140/MTK_Flash_info_by_tkowsar.rar.html" target="_blank">Tool For MTK Flash info</a>   2. For Hardware- when a dead phone not possible to repair only with   software you need to repair phone hardware.  Which hardware you need to check for dead  phone- (1) when you try to    flash if phone not boot check power source/battery voltage/V+ pin in    phone connector. just do confirm phone found enough voltage for  software   operation. (2) if phone power  source is ok but   still not boot, do confirm your tx and rx is 100%  working/tested. (3) if tx rx is ok,  than check your   phone connector, its tx rx pin is confirm connect with  cable and   internal connector pin is joint on pcb perfectly. (4) if pin is ok, maximum china phone  tx rx  going to cpu after crossing a resistor or capacitor so check  them. (5) if resistor is ok now you need to  check  boot diod, all phone have no boot diod so last try is check cpu  tx rx  pin. (6) if boot is ok but phone not    receive flash file, maximum time this problem coming from flash ic or    ram (maximum china phone flash memory and ram have in one chip). so you    need to try first re-hot it if still not solve change it.but its true flash chip/ram always show error not only for them,    sometimes cpu to flash chip/ram connection lost for bad cpu pin or bad    cpu soldering on pcb. so check both of them. (7)  phone flash ok but not power on  (although file is 100% correct) , for  it you need to check   Flash chip/ram  (95% include in 1 chip) Clock crystal and battery 26mhz (near rf ic)Rf ic, Power ic and v+/b+ wayBt icLast try is cpu.</blockquote>

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