need help for accidently lock device

i have sony xperia tipo dual sim phone and in this phone have a 1 problem that dual sim option is not click able and i try to put only sim 1 ......phone work great and if put only sim 2 ,,,,,, phone work good but when both sim is available in the phone the sim 2 option is not showing
well i try many time to flashing with flashtool but no success and diffrent firmware also but no success after that i try to update with sony update
service and phone is update very well but the sim 2 is not work i think may be this situation is creat by me using this code *#*#7378423#*#*


MY SONY TIPO DUAL ST21I2 SHOWS THIS
[X] NETWORK 0
[X] NETWORK SUBNET 0
[X] SERVICE PROVIDER 0
[X] CORPORATE 0
[X] SIM 0


this phone is working nicely since 1 year but this is accidentally lock and i confused with this problem please help me

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