topic Re: Z1 cannot detect SIM card in Z Series

Z1 cannot detect SIM card

leduypanda86 — Thu, 01 May 2014 06:36:30 GMT

Hi,

I bought my Z1 in Australia 2 weeks ago and use it in Vietnam after that. For the first 2 week using it in Vietnam, the phone has worked just fine. Suddenly, 2 days ago when I turned on the phone, it cannot detect the SIM card anymore. I have tried different ways to find out what is the issue: replace another working micro SIM but the Z1 still cannot detect it, plug my SIM to another device and the SIM works well, factory reset the phone (using KitKat 4.4.2).

In fact, before getting this issue, I tried to deativate some core software in the phone (everything related to "social" term) because I thought my phone was quite hot and had fast battery draining issue (which have already been complaint by many users). After doing this, the phone became less stable, which means that after rebooting, there were 2 or 3 times it didn't get GSM signal but when I tried to factory reset the phone, the signal came back.

I wonder where the problem comes from? Because of hardware or software issue? If it's a hardware issue, the phone should be able to detect the SIM card after factory resetting, right?

By the way, the phone still asks me to enter the SIM card's PIN code everytime I boot the phone, which proves that the phone can still detect the SIM, somehow...

Regards,

Duy

Re: Z1 cannot detect SIM card

_alexdon_ — Thu, 01 May 2014 07:38:17 GMT

If it is a hardware problem,no factory reset or software repair will help.Try a software repair:

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

Re: Z1 cannot detect SIM card

leduypanda86 — Thu, 01 May 2014 08:56:42 GMT

Software repair using Service Update doesn't help 😞

Re: Z1 cannot detect SIM card

_alexdon_ — Thu, 01 May 2014 08:57:22 GMT

You need to get to closest sony service:

http://www.sonymobile.com/global-en/support/contact-us/

Re: Z1 cannot detect SIM card

leduypanda86 — Thu, 01 May 2014 14:51:09 GMT

I'm wondering if the issue here come from different baseband or something like that?

Someone told me that the phone get the GSM signal as usual at first, then become unstable and eventually cannot detect the SIM card is because I upgrade the FW to newer version (i.e. from JB to KitKat), since I bought the phone in Australia but use it in Vietnam. Is there the conflict caused by different operator? (I think that my phone is international version and already unlock though)

Re: Z1 cannot detect SIM card

_alexdon_ — Thu, 01 May 2014 15:34:43 GMT

If the phone is unlocked,there should be no problem.To check this,dial *#*#7378423#*#*-service info-sim lock.Paste here the result.

Re: Z1 cannot detect SIM card

leduypanda86 — Thu, 01 May 2014 16:21:31 GMT

Well, after going to Service Info > SIM Lock , it doesn't show anything...

Re: Z1 cannot detect SIM card

leduypanda86 — Thu, 01 May 2014 16:23:59 GMT

However, I don't do root, bootboader unlocked or anything like that. I have just use Flashtool to flash older FW, that's all.

Thus the phone should be locked

Re: Z1 cannot detect SIM card

_alexdon_ — Thu, 01 May 2014 16:24:17 GMT

This is with the SIM inside or out?Strange thing though..

Re: Z1 cannot detect SIM card

_alexdon_ — Thu, 01 May 2014 16:25:05 GMT

I think you should stop by a sony centre,they will be able to help you more...

Re: Z1 cannot detect SIM card

leduypanda86 — Thu, 01 May 2014 16:30:51 GMT

I recognize that when I flash older FW, the IMEI and Baseband become unknown, and the phone couldn't detect SIM card as well as connect to wifi. But now when I upgrade it to lastest FW (which is C6903 14.3.A.0.757), the IMEI and Baseband show. Thus, the phone can recognise the SIM card (by asking me to enter the PIN code) and wifi is usable. However, there is no signal at all, and there is nothing in APN,

Re: Z1 cannot detect SIM card

leduypanda86 — Thu, 01 May 2014 16:38:46 GMT

What I'm trying to do here is to flash back older ROM in order to get the "right" or "original" baseband when I used the phone at first time. I think the reason for this issue is that I use the phone in another country, when I upgrade the FW by OTA, the baseband changes, and the phone cannot read the SIM

Re: Z1 cannot detect SIM card

_alexdon_ — Thu, 01 May 2014 16:41:22 GMT

By SUS,you are not getting any signal?Try to flash 4.3.

Re: Z1 cannot detect SIM card

leduypanda86 — Thu, 01 May 2014 16:45:38 GMT

Based on what I know, if I use SUS, the phone will upgrade straight to 4.4.2. Is there the way to use SUS to upgrade to 4.3?

If I use Flashtool to flash 4.3, because this phone comes from Australia, I chose C6903 14.2.A.1.136 Generic AU 1277-0078_R2B but it doesn't help, the IMEI and baseband are gone.

Re: Z1 cannot detect SIM card

_alexdon_ — Thu, 01 May 2014 16:50:19 GMT

No,I was simply asking about SUS.You need to flash older firmware.

Look here on XDA:

http://forum.xda-developers.com/xperia-z/help/missing-baseband-xperia-z-freexperia-t2230718 (this is from Xperia Z but close)

Maybe you could try to flash baseband from C6916?Do you have C6903?

Re: Z1 cannot detect SIM card

leduypanda86 — Thu, 01 May 2014 16:51:53 GMT

Yes I have C6093. I could flash FW from other z1 serie?

Re: Z1 cannot detect SIM card

_alexdon_ — Thu, 01 May 2014 16:58:52 GMT

http://forum.xda-developers.com/showthread.php?t=2469191&page=2

Read more here,it seems that the specific user wasn't happy after flashing C6902 on C6903.

Re: Z1 cannot detect SIM card

leduypanda86 — Thu, 01 May 2014 17:04:47 GMT

Thank you, I will read it

Re: Z1 cannot detect SIM card

_alexdon_ — Thu, 01 May 2014 20:04:14 GMT

Ok,keep us updated about your decision.

Re: Z1 cannot detect SIM card

Swift1 — Thu, 08 Oct 2015 06:53:56 GMT

I'm too, how to solution was?

Flashing baseband only! I tried, but nothing have come.

Flashing old ROM! I tried, but nothing have come.

plz help me too,

Now I'm facing this problem. thz much guys!