sim card unlock problem

[Dreammy]

Hi,

I bought an SP. The store where I bought it confirmed that its SIMLOCK-FREE. However whenever I launch my phone and enter my pin I get the following error : "Invalid Sim. Emergency calls only." " SIM card is locked. Emergency calls only."
I can enter my simcard-pin. It accepts it and I see the android 4.1 start screen and can swipe to unlock the phone.

I entered a code #*76....*#*#* and opened "SIM Info" This is what I got: 

[x] Network 5
[] Network subset 0
[] Service provider 0
[] Corporate 0
[] SIM 0

This actually means my phone IS SIM-locked.
After emailing for support the store gave me a 16digit code to unlock my phone.

Now, where do I enter this key? Ive been youtubing/googling and everybody gets prompted to enter the code. I never get a prompt anywhere.


Question: How can I open this window/prompt so I can try to enter this key and unlock my phone.

Im running 4.1.2
C5303
12.0.A.2.254


Any other suggestions are welcome too!!

Stuff I tried:
- Tried using other simcards
- Factory reset
- On/Off 
- On/Off

[jeetushivi]

i am from india and now im living in malaysia . i buy here an xperia sp phone. and then i put an indian sim in it . it shows sony logo then the bootanimationthen again sony and boo animation and keep on . but it dsnt starting then an steting type  logo appears and and loding box and then again same sony logo ...bootanimation ....

then i put off the sim and press the power on button without sim card and its on..'xperia sp is on'

again i power on it and put an malaysian sim asi was using it in same phone for 1 month ..and again it starting showing sony logo and soo on ,,,,but dsnt on...whats the problem....it can on without sim but can not with sim card plz help me....

[_alexdon_]

Could your phone be locked on a specific carrier?

[Danial-mach1]

i think your phone is branded?right?

if yes then you must unlock bootloader to use another sim on it

[_alexdon_]

Danial,my friend,as far as I know,bootloader unlocking has nothing to do with network unlocking.If you unlock bootloader it does not mean you will be able to use other SIMs.

[jeetushivi]

i think so

it just not getting on with sim card 

i check the sim lock with *#*#7378423#*#* somthing and it shows [ ] network 0 ....and  [ ] and 0 in all other 4 options

[_alexdon_]

If you do not get any [x],it is fine,no network lock.Download sony update service and repair:

http://www.sonymobile.com/gb/tools/update-service/

After this,try to insert a SIM.

[jeetushivi]

thenks alexdon ..i hope this will help ....im trying it .....

[_alexdon_]

Ok,keep us updated.

[Danial-mach1]

---

@alexdon wrote:

Danial,my friend,as far as I know,bootloader unlocking has nothing to do with network unlocking.If you unlock bootloader it does not mean you will be able to use other SIMs.

---

i apologize for my mistake.

i take wrong between bootloader and netwrok lock