Network Preference Won't Stick

[Avalon60]

I bought my Redmi S3 from a seller on ebay, then found that it came from China, and I've had a problem of no mobile networks for a while, and only recently, with help on the en.miui site I found that I had to change a network setting, in engineering mode, from
TD-SCDMA, GSM/WCDMA and LTE to TD-SCDMA, GSM and LTE so that I could make and recieive calls.

When I reboot the phone, the Network setting reverts back to it's default of TD-SCDMA, GSM/WCDMA and LTE, and I have to change it again.

Is there anyway to make the setting I choose stick forever, without having to continually change it after each reboot.

 

[MarkyO]

Imho you'll be only able to do this using QPST.

 

[Avalon60]

Ok, thanks but what is QPST

 

[MarkyO]

Read http://forum.xda-developers.com/galaxy-s5/general/how-to-add-rf-lte-frequency-bands-to-t2886059

 

[Avalon60]

So to make it a permanent fix, I have to root my phone first and only 30 steps to do it!

 

[Laievskaia]

Read http://forum.xda-developers.com/galaxy-s5/general/how-to-add-rf-lte-frequency-bands-to-t2886059

Have you try this?

Enviado desde mi Redmi 3S mediante Tapatalk

 

[Avalon60]

No, I have not! I don't intend to either, as it seems to much trouble for what it's worth.

 

[MarkyO]

I did it with my ZUK Z1 (no 3G at all) and it worked.

 

[Avalon60]

But did it work after a reboot?

 

[MarkyO]

Yes, certainly. If I remember rightly there's a setting where you can set the preferred network type.

 

[Avalon60]

As I said in my op, I went into engineering mode to change the setting or preferred network, but I could not see where it could be saved. Also on this site: http://en.miui.com/type-108-806.html, where I posted the same question, no one could tell me how it could be saved.
This is a totally different phone than the ZUK Z1, which I have not heard of by the way, so the settings may well be different.

 

[MarkyO]

I talk about a setting which I modified in QXDM. This is stored in EFS partition. These modifications are the same for all Qualcomm based phones.

 

[Eninshi]

Please join us here.. we are looking for solutions for the problem also confirm so devs can do a fix sooner http://en.miui.com/thread-320293-61-1.html

 

[Avalon60]

In the end I sent the phone back, and won't be buying another one.

 

[Eninshi]

Use network signal Guru, download it from playstore it needs root btw,select your band carriers i leave the lte bands all checked and disable gsm band 900 .. . it worked for me