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3G sim card compatability

I have upgraded to your windows 6 and have a rom version 7.0c40CS, thank you its great, radio version 1.17.00 but my phone provider has now upgraded my sim card to 3G and now my phone does not work, it says no service available yet the card works in any other phone! I have carried out a hard reboot but still no good, can I use 3G? or do I have to go back and reactivate the old 2G sim card?

You are using a very old rom..try this version of the shekhar's rom
http://forum.xda-developers.com/showthread.php?t=387451

3g is a hardware thing not a simcard thing

Rudegar said:
3g is a hardware thing not a simcard thing
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Right man! singjim may need to buy a new phone with 3G support then u can use ur sim card

3g simm card
Yes I need a 2G simm card, but when I got the old 2G card re-activated by the provider ( it works in other 3g phones ) I still have no service on the network.
I have updated the ROM as recommended by Ather90 and still it does not work. I have swapped the 2G simm card with a friend and tried his in my phone and it does not work! What a coincidence that my PDA dies when I change the simm card? I'm still lost help please.

2G network
singjim said:
Yes I need a 2G simm card, but when I got the old 2G card re-activated by the provider ( it works in other 3g phones ) I still have no service on the network.
I have updated the ROM as recommended by Ather90 and still it does not work. I have swapped the 2G simm card with a friend and tried his in my phone and it does not work! What a coincidence that my PDA dies when I change the simm card? I'm still lost help please.
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Man! upgrade is not effect ur sim card, i think ur provider doesn't support 2G network anymore. I have upgrade my Xda II almost ten times already and it still working.

3g sim card
yes Iagree, I expect sim card is OK so what is wrong with PDA? Why does a reset as complete as a Rom upgrade not reset the phone?

This is the Same Problem i had with my Previous Himalaya..It always showed "Invalid SIM Card" or "No Service"...
i pulled out all of my hairs to solve that problem but it didnt...so i had to replace it...

Does your GSM provider still have their 2G network? If yes, insert your SIM to a SE phone and try it with 3G disabled (SE got a option to disable 3G & to use 2G only). If that also works, try a 2G sim of some other GSM provider in your PPC. Here we dont have to upgrade the sim for get 3G. we can still use the old 2G sim. But to have HSPA or speeds above 512kbps, we need to upgrade to a 3G U-SIM.

re 3g simcard
i use a 3g simcard using latest c_shekhar rom.. and it works.. no problem at all, only the stk doesnt work..

3G sim card
Took it to the XDA repair man who pulled a face at the cooked rom! then reloaded windows 2003 or something very blue and it all works!!! Plus 50$ for the trouble so I cooked it again to 6.1.2a16cs and everything is fine. It seems the phone operator deliberately immobilized the phone to make me buy a new one!! be careful out there.

[Q] Very Weird Problem. Need Urgent help please.

I Exchanged 5 HTC ONE Dual Sim phones(802d) and finally got a flawless device without gaps/dead pixels/camera problems. Today however, when I inserted a second sim in SIM 2 slot, it showed no signal in my house. I put the same sim in sim1 slot and it was working fine. When I got out of my locality, the sim2 slot got a 4 bar signal and was working without any problems but as soon as I came home again the sim2 lost the signal. Basically, the sim1 slot is working fine in my house with both the sim cards but sim2 is not giving any signal.
My questions:
1) Both the sim cards are giving me a normal signal in my house in SIM 1. But as soon as I insert any of them in sim 2, they are giving no signal. Is the sim2 slot damaged by any way?
2) If it's damaged, how is it(the sim2 slot) giving me a normal signal as soon as I leave my locality?
I WOULD REQUEST AS MANY USERS TO GIVE THEIR INPUTS AS I JUST HAVE 3 DAYS LEFT FOR MY 14 DAY REPLACEMENT POLICY. IF IT'S NOT A ISSUE, THEN I NEED NOT GET IT REPLACED.
HOPING ALL OF YOU HELP ME OUT HERE

anyone? I really need help

Note 5 at&t emergency calls only issue.

Hello. About a 4 months ago i have bought from eBay a note 5 at&t version. I live in Greece and my network operator is WIND GR. The phone works fine but from time to time i get an emergency calls only message. And i can't get and do a phone call. If i restart the phone everything goes to normal. Sometimes it goes on and off by itself (the problem).
Have been anyone experiencing the same issue? If the phone is incompatible with my network operator should it not work at all?

Did you tried to change the sim card? Maybe issue is from sim or from sim slot

johnny.goldy said:
Did you tried to change the sim card? Maybe issue is from sim or from sim slot
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My sim is new. When i purchased the phone i have changed my old sim with a new sim 4g compatible.

It happened again. And i am missing calls like this. I will smash it with a hammer

Go to settings, backup and reset, then reset only network settings, see if any better signal

johnny.goldy said:
Go to settings, backup and reset, then reset only network settings, see if any better signal
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Done that right now. Tomorrow i will get a new sim card and i will post if anything gets better. Thanks for the help.

Update of the situation. I have changed sim card 2 times. It still happening. My phone runs at nougat now and the problem still appears as before at 5 and 6 Android version. I currently gonna change service provider that has better and stronger signal. From what i have discovered. When the phone looses signal due too poor service provider signal sometimes it can't register to network by itself. If i enable airplane mode and then turn it off it comes back. Any clue? If it's hardware issue what can i change?

Should i have at the mobile networks auto detect or manual and my carrier?

Wifi and mobile signal suddenly turning off while playing.

Hi guys. So its been a week using my tencent rog flashed to WW firmware and fingerprint. Im on 1910.44
I noticed while in the middle of the game i got frequent disconnection issue while on wifi. Immediately i scroll down notif to check wifi or network aim signal and all are off, the wierd thing is after 5sec im back online again. So it keeps happening over and over again.

Are u using 2 sims? Have the very same problem, it stopped when i left only 1 sim card there

CRYPTfromCATACOMBZ said:
Are u using 2 sims? Have the very same problem, it stopped when i left only 1 sim card there
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Yup im using dual sim. So i guess dual sim is the culprit. I go on airplane mode and the disconnection in the middle of the game goes away

Same problem when I am on dual SIM. Turning off one of the Sims work fine, but then it won't be working as intended. Hope they fix the bug...

meqwerty said:
Same problem when I am on dual SIM. Turning off one of the Sims work fine, but then it won't be working as intended. Hope they fix the bug...
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How to turn off the second sim while it is still inserted?

Barbatos19 said:
How to turn off the second sim while it is still inserted?
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Under settings > network & internet > sim card

Having this bug too, i sent my log for asus, hope have a fix or android 10 fix this

i got same phone problem is... my signal not losing but cant call or receive any call

I saw in zentalk forum. Sad to say ????

4G not active on Sim slot 1

I am on stock MIUI 12 ROM right now and it is all working fine except that my 4G/LTE isnt working in Sim Slot 1 anymore. it is only connecting to HSPAP.
I then tried putting the SIM Card in my mothers phone to check if i could get a 4G signal there and it immediately did, so i am certain its either a problem with my Redmi 8.
Strange thing as well is that i tried putting the SIM in the second slot of my phone and somehow it does get 4G/LTE connection when i have it in slot 2.
I already checked if the APN settings. Anyone else having this problem, because i couldnt really find anyone else with a similar problem.
Im afraid my 1st SIM Slot just got broken somehow
Can anyone help me fix this?

Tauseef786 said:
I am on stock MIUI 12 ROM right now and it is all working fine except that my 4G/LTE isnt working in Sim Slot 1 anymore. it is only connecting to HSPAP.
I then tried putting the SIM Card in my mothers phone to check if i could get a 4G signal there and it immediately did, so i am certain its either a problem with my Redmi 8.
Strange thing as well is that i tried putting the SIM in the second slot of my phone and somehow it does get 4G/LTE connection when i have it in slot 2.
I already checked if the APN settings. Anyone else having this problem, because i couldnt really find anyone else with a similar problem.
Im afraid my 1st SIM Slot just got broken somehow
Can anyone help me fix this?
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Due to my understanding, on some Xiaomeme devices, 4G/LTE only active on 1 SIM slot ( 1 or 2 depends ). It may miss-understanding with the Dual stand-by which show the ability of giving both SIM slots to be active at the same time.

LinhBT said:
Due to my understanding, on some Xiaomeme devices, 4G/LTE only active on 1 SIM slot ( 1 or 2 depends ). It may miss-understanding with the Dual stand-by which show the ability of giving both SIM slots to be active at the same time.
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Click to collapse
My mobile support dual 4G that allow 4G connectivity on both Sim slots. I have been using 4G on both SIMs before.

Tauseef786 said:
My mobile support dual 4G that allow 4G connectivity on both Sim slots. I have been using 4G on both SIMs before.
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Then u may try Reset network settings, sometimes it helps

LinhBT said:
Then u may try Reset network settings, sometimes it helps
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I try this and also i flash a new ROM but problem not solved