I am using a china dual sim moble which i purchased from Dubai. when i reached India sim1 slot is working and sim2 slot shows invalid sim. can you pls advice me how to go ahead to use both sim in this mobile.

I HAVE A CHINA SET SIGMATEL S90 DUAL SIM ONLY SIM 1 IS WORKING FOR SIM 2 SHOWS AS INVALID SIM FROM FEW DAYS PLEASE SOLVE THIS PROBLEM

BABU
9035040544

i have a china made mobile n8 but after inserted it shows invalid sim what's the solution of this problem

Dear Sir's
I purchased mobile dual SIM China Sigmated FXD T99i. But 2nd SIM not activated and show Invalid sim on desktop since Decembir-2009
Kind Pl. help me & guide. My mobile No is 9535907858

my mobile is sigmatel FXD 3600 dual sim.
my sim1 is work and sim2 is not work.
imei no. is one.
please registre my imei no.

put sim card back into #2..switch sim #2 by itself...now call the Lebera carrier from a land phone (the tech will help you reset the lebara sim card)..once you are back on with lebara switch back to dual sim.........

Change of the SIM Places that you inserted !
Insert your working SIM1 to phone SIM2 SLOT Insert your not working SIM2 to phone SIM1 SLOT

Solution :

• If your SIM2 that you inserted into SIM1 SLOT remain not working !

1. Your sim card is defected or Phone does not support this sim card!

• If your SIM1 that you inserted into SIM2 SLOT is not working

1. There is a problem with phone's SIM2 SLOT

In case of SIM2 SLOT problem i can help you to get it fixed contact : omniarepair at gmail dot com

Best Regards

hey,i just got mine yesterday and i experience the same thing but i figured out how to do it on my own.im a fourteen year old and was surprised that i got it but heres how you get it to work...

first, go to settings and hit dual sim settings.

second, theres gonna be four options theres:dual SIM open,only SIM1 open,only SIM 2 open,or flight mode.depending on what slot you put your sim card in thats the one youll choose,i put mine in the first slot so i hit only SIM1 open.\

next, you take the back off of your phone and double check that your sim card is in the correct slot.

then, put the back of your phone back on and turn your phone on.

finally,when it turns on your network should come up the the top where it used to say insert SIM1 or insert SIM2, and i have at&t so when i turned mine on single showed up at the top right under the little symbols at the top.

i hope this helped.

if not,i apologize lol

have a nice day(:

Go to Settings/Dual SIM settings and choose Dual SIM open. Perhaps this is the problem.

my dual sim 2 is show searching why

get both sim option (switched on) from the way of main menu settings.
and restart your mobile phone.
and use both sim"s(sim1 and sim2).