Network issue - Xiaomi Redmi 3s Questions & Answers

I tried all the possible solutions like flashing stable rom and again flashing custom rom . But the network is not working. Same is working fine in stable version.Please suggest hte soultion this problem what could be the reason. The Network is not work for almost all custom Roms.
Please take this in consideration and solve the problem.Please some one reply for this problem.

install Network Signal Guru and disabled band 2100 or 900

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MIUI 1.7.22 and signal problems

Hello..
I have just flashed my phone to miui 1.7.22 using the guide in that posts.
and for some reason now i have a jojo signal. (going up and down).
i have tryed setting it to 2G only and also picking the network manualy after its its searched after. but nether seems to help.
is there any other solution for this?
PS: Iam also on telenors network in norway.

[Q] Defy with 850/1900 3g bands

Hi, terribly sorry if this is a repost but I've searched all over general and don't see an answer.
I've seen posts on other sites that state the t-mobile defy can be used for att 3g but will not have the 1900 band, is this true?
In that same thread I saw someone claiming that you can get both. On gsm arena I see that some defy's should have 850/1900.
What version supports both the 850/1900 bands for 3g?
Thank you,
I've brought this up in another thread and there was no reply. From what I read there is two issues here. First is the hardware and then the ROM you flash your defy with (firmware). They both need to support the frequency. I suspect the hardware is the key.
So if your phone hardware does not support a frequency I don't think you can switch it by any firmware. (This is all about 3G by the way, Defy is quad-band for 2G, GPRS, and supports all 2G frequencies.). I think Defy UK is 900/2100 for 3G on T-Mobile.
This could be wrong so I hope some expert will reply to confirm it - and perhaps tell us how we can check what frequency our Defy hardware/firmware supports!?
Could you try to read this forum
http://forums.whirlpool.net.au/archive/1598301
Thanks for the reply, it's a long thread on that forum and talks about just about anything (not specific to Defy + 3G). But I had read it before and had another quick look at it again today.
One thing I couldn't find was how to check what 3G frequencies your Defy has Firmware/Hardware. Anyone ?
XT535 no 3G (WCDMA 1900)
I recently bought the Defy XT535, and I didn´t take note on what frequencies did it worked on.
I have read on the thread dedicated to update the XT535 from GB to ICS that some people have problems with their 3G connection working after the update, and I think it has to do with the chinese SBF file.
I´ve also read in http://forum.xda-developers.com/showthread.php?p=11176044 you can fix your 3G connection by flashing a new SBF file.
Unfortunately, I haven´t found a SBF file that can be flashed for my device that will fix my 3G. Anyone has solved this issue already and can give me a hand?
XT535 HW didn't support WCDMA 1900. http://www.gsmarena.com/motorola_defy_xt535-4622.php
Changing baseband won't help.
Furthermore, that's thread was so old. They use "zip" patch to fix baseband, not .sbf (.sbf means to be only stock rom files.)
We now use Basebandswitcher to fix MB525-526 baseband easily.

2G Network Problem

Hi,
I have an Atrix 4G (M860) with 2G network problem.
When i choose 2G-GSM in mobile network section, it says operator is not available.
There is no problem with 3G-WCDMA usage.
I've tested custom roms such as CM7, neutrino 2.8 etc ... and also flashed different radio versions with no success.
Device has stock Turkish firmware now and the problem still persists.
Could you please advise how we can solve this issue ?
Thanks in advance.

Problem with the data connection in Chinese roms

Brother I have a small problem with a Chinese roms I got the thing is that you want to connect to the telephone network data to see if I could help with this problem (I have well APN) or telling me what files of telephone network drivers for other roms change it so that if you grab data MIUI or so I can not state how if so thanks in advance. google do excuse my English.
rankiao2330 said:
Brother I have a small problem with a Chinese roms I got the thing is that you want to connect to the telephone network data to see if I could help with this problem (I have well APN) or telling me what files of telephone network drivers for other roms change it so that if you grab data MIUI or so I can not state how if so thanks in advance. google do excuse my English.
Click to expand...
Click to collapse
Well I assume that you are talking about the data problem of all Roms based on Aurora and with 3.0.8 kernel, which is that the data stop working after sometime of use (the sign is there but there is no packet exchange). I have to say that I have this problem too with both Aurora and MIUI V4 and I noticed that it occurs more often after using extensively the data (for ex. when downloading a file) and the only way to fix them is a reboot (not airplane mode nor turning the radio off has any effect). I tried changing the network type to CDMA/LTE and selecting the network band (from *#*#4636#*#* menu) but with no luck... So I am at the same position as you are, waiting for someone to find and fix the problem.
It feels like it is kernel related so lets hope that PaulMilbank do something for this.
If anyone has any idea please share!
Cheers
I think it's not kernel-based 'cos I had this issue even on stock (B138) ROM. And I saw a lot of whining about U8800's loss of data connection when entering any building on russian forums.
哈哈

how to get both sim 3g working ???

can any one help me in how to get both sim 3g working
is there any common patch available
or
what are the changes that should be done in rom before flashing it
please help me at this

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