Sim doesn't work - Xiaomi Redmi 6 Questions & Answers

I have my Redmi 6 since December and when I rooted the phone, get the issue that my mobile network doesn't work, the IMEI is fine (+#06#) but I can get any messages and phone calls, I've clean my sim, change the network (4g, 3g, 2g) and never solved my problem, I appreciate if u help me with that...

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Issues with US Cellular TP2

So the CDMA TP2 has a sim card slot in them so they would work as gsm devices if unlocked. I bought one for a month and now im having some issues with it lol. Everything runs fine but this one problem. When i go somewhere and lose signal for over 1min or so i get a 1x. once i regain signal and receive some bars the 1x is still there instead of E or G. The 1x is a problem for me because i cant receive or send messages and phone calls with it. Only way i know that fixes it is to reset the phone but does anyone know how to fix it, fix it? Like a change of settings or installing a .cab file that would fix the problem? or would this be a radio issue?
sorry lol i feel stupid. Its my first time having a cdma/gsm phone so i started exploring the phone settings. turns out i didnt change the baseband to GSM.
change your network settings to gsm and not global

Nexus 5 not registering on T-mobile Network

Phone's Settings read
Mobile Network Type- Unknown
Service State- Out of Service
Mobile Network State- Disconnected
My IMEI still shows up and I can connect to WIFI and bluetooth. The only problem is I can't get a signal, not 2G or 3G (even LTE)
This started happening out of nowhere, I tried taking out the sim, factory resetting, wiping caches, changing the APNs, restarting the phone, and I even put the sim in a new phone (It got signal).
If anyone has any ideas I'm all ears! What's the point of this amazing phone if I can't call people with it?
How long did you have the phone before this happened? Did you dial *#*#4636#*#* to check the phone info and change the network type?
I had a similar issue, but I think mine was a lot worse due to a dirty flash. I ended up having to do a fastboot recovery to restore it to factory.
Sent from my Nexus 5 using XDA Free mobile app
Raphael17 said:
Phone's Settings read
Mobile Network Type- Unknown
Service State- Out of Service
Mobile Network State- Disconnected
My IMEI still shows up and I can connect to WIFI and bluetooth. The only problem is I can't get a signal, not 2G or 3G (even LTE)
This started happening out of nowhere, I tried taking out the sim, factory resetting, wiping caches, changing the APNs, restarting the phone, and I even put the sim in a new phone (It got signal).
If anyone has any ideas I'm all ears! What's the point of this amazing phone if I can't call people with it?
Click to expand...
Click to collapse
What service are you with? I had this same exact issue a week ago with an LG G2. My Sim card would work in my Nexus 5 but wouldn't work in the G2.
After numerous factory resets I eventually called Metro PCS (my carrier) and I was told that whenever I put my Sim Card into a new phone I must always contact them and give them the new IMEI # so that the phone can work.
The Metro PCS rep claimed that they have a feature that disables the Sim from working in an unauthorized phone. I guess its to help with theft.
neXus 5
Hi, were you able to fix your issue? I am having the same exact issue and have done all troubleshooting I can do on my own but still nothing works.
If you have a method of fixing this please share.
Thanks,
iskyi said:
Hi, were you able to fix your issue? I am having the same exact issue and have done all troubleshooting I can do on my own but still nothing works.
If you have a method of fixing this please share.
Thanks,
Click to expand...
Click to collapse
I know this is really OLD!!!!
but i just had the same issue today
with a NEXUS 5 running stock marshmallo 6.0.1 with the latest patches
, and yes... is not the phone is the carrier
MetroPCS do IMEI lookup
i had another phone before the NEXUS 5
so it is no just matter of swapping the SIM card from one phone to the other
you need to call CS and you told them that your phone is not registering on the network
and that you just swapped phones
So they ask you for the IMEI of the "new" phone
and your SIM card #
you reboot your cell
and VOILA!
now the phone registers in the network
Yes, Metro do IMEI authentication

[Q] 3G not working

My new Honor 6 H60-L02 doesn't seem to have a data connection. The telephoning/messaging works well, but when I am out of wifi range, and want to use the internet, the message I get is 'no network connection'.
Any help appreciated.
Sorted!!
It was my sim card settings, OK now.
Which settings you mean? I've got the same problem on h06-l04 and did everything like deleting the APN, tested APNs from other providers etc. - nothing helped. The SIM shows h+ and h all the time, but when I try to open a site or try to update my apps over google play the connection works a few seconds up to a minute and then the connection got lost again. It never happened on my galaxy s2.
I used the APN settings on my sim card providers web site and they worked perfectly. If I am not in a wifi zone the phone switches to h+ and performs very well.
3g not working
So my new huawei honor 6 is not supporting 3g. It only shows edge connection. How to sort this out? Please help.
Logno said:
So my new huawei honor 6 is not supporting 3g. It only shows edge connection. How to sort this out? Please help.
Click to expand...
Click to collapse
What model do u have? H01, H11 - won't support Euro 3G, thay are only for China. H02 and H12 - should work fine with 3g. H04 - Should work fine with 3g and 4g in your country.
Also please check if your carier provides 3g service.
jamsh said:
My new Honor 6 H60-L02 doesn't seem to have a data connection. The telephoning/messaging works well, but when I am out of wifi range, and want to use the internet, the message I get is 'no network connection'.
Any help appreciated.
Click to expand...
Click to collapse
What country you live?
Mine just had 2g network on TMobile network USA
hi guys if want to solve this problem i know this is very late replay like a year xD but this can be fixed by turning airplane mode on then off
I received huawei from Uk. Honor 7, Network unlocked but i cant access 3g to 4g service data. It only works when i turn to 2g, edge and very slow. Any help?
3G/4G issue
I'm also having the same issue with my Honor 6+ which i bought last month from dubai. I'm trying to use data connection using 3G/4G in india as i'm residing in India, but even after following all the required settings that are provided by my service provider and the other trouble shooting steps i'm still no where. It always displays the 3G/4G icon at the top but never works. I doubt if it is something to do with the software/firmware version. Please suggest.
I'm also having the same issue with my Honor 6+ which i bought last month from Malaysia and using in Bangladesh. I tried airplane mode on and off, it shows 3G for few moment or minutes but then again it becomes edge mode. Please help me out from this problem.. thanks in advance..
I live in India and I bought my Honor six plus online from a local retailer, and my phone can only access 2G data (or EDGE, apparently ) which is too slow to support anything. At first, I thought it was a sim card issue but I tried using the same sim in someone else's phone and that person's phone had no such problem. Even my brother's Iphone faced nothing of the sort. Any one know how to fix this?
Check on the back of the phone for phone number. On my honor 6, on the back on the lower part are 2 lines with text. on the second line I have found my phone model: H60-L2, in my case. Then you can check with, for example, http://willmyphonework.net/ if your phone model will work in your country. I know for example that my phone model will not allow 4G in all European countries.
If you prove that your phone is working in your country than its a matter of settings. You can try:
- Place the sim card with a data plan on the main sim tray. Honor 6 not rooted and running stable ROM will allow data only on the first tray. In Settings -> Dual Card Sim Management you can see which card is in which tray. If necessary switch the sim cards into the other tray.
- Check your settings and here the most important one is the APN. Make sure that the settings of your operator are correctly set in order to have mobile connection.
Generally the 3G network should at least be recognized, so if your phone is not registering with a 3G network then either it is not hardware compatible or you have placed your SIM in the wrong tray. Most probably is the first option and what you can do is to change the phone...
Man...i was having the same problem...well just 2 mins back!??
I have marshmallow update...and wat my problem was that the apn was set, though correctly, but in upper amd lower case....
And it seems apns are case sensitive...so check it!
Honor 6x is my latest mobile, which i bought a week before, it's seems like the mobile having data connection problems. till i'm using 4G sims but i'm not getting at least 2g speed, most of the time i'm not getting internet connections. at the same time it's showing H and H+ symbols ...
if possible, someone pls help me here.

(HELP) nexus 5 emergency calls only imei OK

Dear experts,
I have got a nexus 5 of a friend, which has network issue. I have flashed all factory images and almost all modems, but it still gives me emergency calls only and my imei is ok. Network state shows not connected. I am a Note 2 user and had Same issue in my Note 2 too. But it was solved by patching modem with zulumans modem patcher. I tried patching modems but there is no modem.bin in the modem folder. I tried to change the radio band using *#*#4636#*#* but it only shows US band.
Please help me. Thanks.
I am having same problem. My nexus 5 was working fine till 3 days ago when all of a sudden there was no signal. It shows my network name but says "no service". I thought it could be sim related issue and got it replaced. Still it shows the same.
I havent tried flashing modems/radio.
One funny thing is, i tried putting another sim of a different provider. It showed signal for a minute or so and then dropped (shows no service).
When I scan for network it is able to see all the available network but then it doesnt register on a network.
I'm from India and I have BSNL connection.
Tried flashing kitkat and 5.0 fatory images...nothing happened,
PLEASE SOMEONE HELP
!
Bump
One other strange thing is when i tried a sim of another network it got registered!!! but then i was not able to make calls. I tried calling the number from another phone and it said the phone was switched off. I don't understand.
1) Is it a prob with antenna? 2) or the motherboard 3) or sim (which is unlikely as it is working just fine on my new oneplus one). Please someone help...
Does it never occur to anyone to backup efs and store on a card or LT
emergency calls only (Motherboard Problem)
Emergency Calls Only, This is due to substandard nexus hardware quality, as around the world all nexus 5 phone owner face the same problem, google is silent on their fault, i will never buy nexus phone in future, or faulty upgrade destroys our phone hardware,
My nexus in block by t mobile well my iemi is I think I want to unblock it just shows no signal
Sent from my Nexus 5 using XDA-Developers mobile app
Is the imei on the blacklist?

Xiaomi Redmi Note 8T only Edge no 4G anymore

I don't know what else to do without returning the phone under warranty or doing a hard reset first to see if that fixes the problem. I bought a Xiaomi Redmi Note 8T in July 2020 and the phone can only connect to a 2G network (Edge's E is at the top instead of 4G in one). I have not changed anything and am afraid that it is broken in my mobile if possible. I am using the Google products and not the installed Mi products, I have Android 10 with Miui 12.0.3 (the last one).
What I've already tried: I've been in contact with T-Mobile because my son has the exact same phone and subscription. It does have 4G just like I did before. All settings are the same, in terms of T-mobile server, preference for LTE networks is set, etc. In the Settings everything is the same. According to T-mobile, there are no problems with the network. I have done another system update (to Miui 12.0.3). Mobile data turned on and off. Airplane mode and reboot and back on. APN reset and then phone started did not help either. When selecting network automatically, I turned off and manually search, but then the mobile only finds 2G networks.
Then a clear moment and see if it is the SIM card, so my SIM card in my husband's iPhone and yes it just indicated connected to 4G. Then my husband's SIM card in my Xiaomi and then it only indicated E again. With my son Xiaomi have done the same but again 4G on his and with his SIM card Edge in my phone again. So I'm sure it's the problem with my phone. Who else knows what I can do? I will try after a hard reset the same Edge network will still remains or if 4G works again. All responses welcome!
I think that there is something wrong with the GSM module because I tried *#*#4636#*#* and then tried several settings but it still give Edge even if I force the network to LTE only. If I give in LTE only it says: IWLAN no roaming, only emergency calls.

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