big problem for 5200 and 6131
 

hello i have big problem with 5200 and 6131
5200 tes point failed evry time
6131 i flash with version 6.10 and after i dowgrade to 5.50 after flashing stpop factory setting and seding pool failed what the blem

U r not using the modified cable....only using that will make ur phone goes into local or test mode for the factory settings...

i have not pb cable
 

thank but i have good cable flash weel i ask if is possible vers 6.10 to dowgrade 5.50 or i dowgrade for the same versio,n 6.10

not problem with downgarde this model may be have a cbale problem or another problem