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unlocked phone erased sim card?

I wanted to test the unlock i did on my phone yesterday, so i put my brothers tmobile sim card in my phone, but all it did was show a sim card icon at the top of the status bar, and i didn't have signal. so i just figured the unlock didn't work.
Then when my brother put his sim card back in his phone, his wasn't working. apparently the sim was reformatted or something, and now he has to get a new sim. anyone heard of this before? also should i try another sim card, or will it just destroy that one too?

drizzle67 said:
I wanted to test the unlock i did on my phone yesterday, so i put my brothers tmobile sim card in my phone, but all it did was show a sim card icon at the top of the status bar, and i didn't have signal. so i just figured the unlock didn't work.
Then when my brother put his sim card back in his phone, his wasn't working. apparently the sim was reformatted or something, and now he has to get a new sim. anyone heard of this before? also should i try another sim card, or will it just destroy that one too?
Click to expand...
Click to collapse
you forgot to select network operators in the wireless settings. in the wireless and network setting select mobile network then select network operators your phone will then scan available network operators and show you at&t or t-mobile after the scan. since you want t-mobile simply select it.

gorgy76 said:
you forgot to select network operators in the wireless settings. in the wireless and network setting select mobile network then select network operators your phone will then scan available network operators and show you at&t or t-mobile after the scan. since you want t-mobile simply select it.
Click to expand...
Click to collapse
would that have made his sim card work again if my phone recognized the network? or was that just something weird that happened. I am new to the whole unlocking deal.
Thanks for the help, I am a little nervous to try it now, as i dont want to mess up his card again! :/

you should be fine. is your contact actually stored on your sim? ,maybe your brother's sim is empty but his contacts are stored in his phone. contacts stored in sim card are not easily get deleted than contacts stored in phone simply import you phone contacts to your sim to be safe.

my contacts are fine, but his phone actually would not work when he put his sim card back in his phone. it's just a regular dumbphone, but he didn't have signal or anything. Do you know what would cause that?

there must be an option somewhere in his phone to select the wireless network he has. what phone he is using? maybe a simple reboot on his phone with his sim card already in place would do.

yea maybe, i think he was going to go to tmobile this morning.. i guess i can't really call him to have him try though!
anyway i'll see if he will be brave enough to let me try again! thanks for the help!

I may understand sim cards wrong but from what I understand the sim does not announce to the carrier hey this is eric shins phone. It instead just broad casts a number the carrier sees the number and associates it with eric shins number. That's why you can buy a prepaid att phone call the company up, give them the sim number and they can connect that with your phone.
More then likely the sim was physically damaged
Sent from my SAMSUNG-SGH-I897 using XDA App

hmm.. that does make sense. I thought i had heard of other people just popping in other people's sim cards and it wasn't a problem, but i don't know.
Just kinda strange that it was working before , and after i tried it, his phone no longer worked. Maybe it was damaged when he took it out or put it in, but from my experience they are pretty sturdy pieces of plastic!
i'll have to see what he says when he gets it fixed.

crystalhand said:
I may understand sim cards wrong but from what I understand the sim does not announce to the carrier hey this is eric shins phone. It instead just broad casts a number the carrier sees the number and associates it with eric shins number. That's why you can buy a prepaid att phone call the company up, give them the sim number and they can connect that with your phone.
More then likely the sim was physically damaged
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
hmnn... thats what I thought because the op post that somewhere in the process when putting back in the sim he see's it was reformatted. just like putting an sd card with my other phone that is not samsung it can't read/open files unless you format it that would surely delete the data in it. in his instance without a warning it automatically formatted the sim and deleted all the data in it which would make it useless. in his case the sim card before is associated with the network but somehow reformatted and the data in it was lost.

so he went to tmobile today and got a new sim card, and everything works again.
maybe it did get damaged in the process.. who knows now!

UK SIM not working even though phone is Unlocked

Ok so I am in the UK right now for the summer. Before I left I unlocked my phone and when I got here I went and bought a pay as you go 3 SIM card since they offer all you can use data and all.
The guy at the store said to wait 20 min then call 444 to register the card. After 20 minutes or so I still had no signal on my phone. I went into settings > Wireless > Mobile > Select network and selected 3 but it said "this SIM card could not be registered on this network." Same thing if I selected automatically. So I decided to try a friends Vodaphone pay as you go card in my phone. The Vodaphone card works perfect, I can make calls, send sms, etc.
So I went back to the store the next day to see what they say. The employee put the SIM in her phone and it worked perfect, which means that there is something wrong with my phone.
I went back and decided to unroot then reroot and unlock. After encountering multiple problems with that I have finally gotten back to root and unlock but the 3 SIM card still does not work while the Vodaphone one does.
Is there anything I can do from here to get the 3 SIM to work?

What rom are you using?

sorry forgot to mention that. Right now I am on the stock rom and stock radio. I tried flashing another radio and using the SIM card on Leedroid and RCmix HD and nether of those worked.

Have you try selecting different band like EURO band (may be worth a try )

pakxelaos said:
Have you try selecting different band like EURO band (may be worth a try )
Click to expand...
Click to collapse
not exactly sure what that means, do you have a link handy, please? I am willing to try anything, as long as it does not brick my phone.

Open Phone Dialer
Dial: *#*#4636#*#*
Press Phone Information
Hit Menu
Choose Select Radio Band
Choose EURO Band
Turn on Airplane Mode for about 20 seconds and then turn it off

pakxelaos said:
Open Phone Dialer
Dial: *#*#4636#*#*
Press Phone Information
Hit Menu
Choose Select Radio Band
Choose EURO Band
Turn on Airplane Mode for about 20 seconds and then turn it off
Click to expand...
Click to collapse
No still did not work thanks though for trying. I also restarted the phone, reselected the EURO band and put on airplane mode but still nothing.
Any other suggestions?

dreshden said:
No still did not work thanks though for trying. I also restarted the phone, reselected the EURO band and put on airplane mode but still nothing.
Any other suggestions?
Click to expand...
Click to collapse
Have you tried the 3 SIM in a different phone perchance? It seems like the unlock and the Inspire are working as the Vodafone SIM worked.

I agree, maybe there's something different about that sim that the Inspire can't read it.
id10terrordfw said:
..
It seems like the unlock and the Inspire are working as the Vodafone SIM worked.
Click to expand...
Click to collapse

id10terrordfw said:
Have you tried the 3 SIM in a different phone perchance? It seems like the unlock and the Inspire are working as the Vodafone SIM worked.
Click to expand...
Click to collapse
Yes I took it back into the store to see what they would say/try to get a refund. They store employee put it into her phone and one of her coworker's phones and the it worked fine in their phones. I do know exactly what kind of phones they had since they were for sure Euro only models that I have never seen before but one of them was a Samsung with a touch screen and keyboard, much like a blackberry. Not really relevant to this, I think.
They would not give me a refund since it work in their phones. Which is why I am here stuck with a 3 SIM card and looking for help to get it fixed

Well that at least establishes where the problem is. When you boot the phone with the 3 SIM, does it give a "no sim" error, no signal at all , or no data access(voice/999 still work)?

When I first put in the sim it gives me a popup saying "Unable to detect your SIM card. Please make sure that your SIM card is properly inserted and restart the phone." It gives two options, Shut phone down and Restart. It also says this when I put the Vodaphone card back into the phone. I just have to restart the phone and I will have signal when I have the Vodaphone card in.
So I click restart. After it reboots, I have no signal (grayed out bars with a small 'x' above them). In my notification tray I have 2 new notifications. One saying that my SIM card has changed and another saying there is a sign in error to my gmail account.
If I click on the "SIM car changed" notification it gives me a pop up saying "You have insterted a new SIM card. Your phone will change the following settings according to your SIM card: bookmarks, shortcuts, wallpapers, ringtones, language selections, and input settings. Are you sure you want to replaces these settings on your phone?" Then it gives me 3 options, "Yes" "No, later" and "No."
I do not get any other notifications or error messages after a restart.

Backup your ROM then try flashing cm7 and see what happens, with the 3 SIM in the phone.
Sent from my HTC Inspire 4G using XDA Premium App

Ok I wiped everything and installed nightly #77 with the 3 SIM card in the phone the whole time. It has been 2 hours and I have not taken out the card yet and it is still not receiving service. So I have no idea where to go from here.
If there is nothing else I guess I will just have to suck it up and go spend some more pounds and get a Vodaphone card for myself.
Thanks for the help and if there is anything else you can think of for me to try please, I am open to all suggestions!

dreshden said:
Ok I wiped everything and installed nightly #77 with the 3 SIM card in the phone the whole time. It has been 2 hours and I have not taken out the card yet and it is still not receiving service. So I have no idea where to go from here.
If there is nothing else I guess I will just have to suck it up and go spend some more pounds and get a Vodaphone card for myself.
Thanks for the help and if there is anything else you can think of for me to try please, I am open to all suggestions!
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Click to collapse
If they won't swap it out for you than I would say that is the best bet. I know for a fact that cm7 supports 3. There has to be some other factor affecting it. Did you have the 3 guys try their SIM cards in your phone?
Sent from my HTC Inspire 4G using XDA Premium App

No they did not, that is the only thing. They never put their card into my phone.
*sigh* I was really hoping for unlimited data because that would have been soooo helpful to be able to use maps while wandering the city. I guess this just was not meant to be.
Thank you so much for all the help! I really appreciate it!

[Q] HTC Merge SIM help

Hello, I bought a SIM card from straight talk hoping to use it on my merge because I have seen people online that says I can do that as long as i have my SIM card unlocked. But after I got the card activated and put it in my phone it don't work. I try changing to GSM and using their APN but I have no signal, the mobile network just stays unchecked and I cannot check it. After a few minutes my phone suggests switching over to global mode and i do have mobile signal then but still no connection with anything. I called the straight talk woman and she told me it only works with AT&T or T-Mobile phones but it just don't make any sense to me that you have to have one of those previous carious just to get them as a new carrier? Am I missing something here?

Fixed
deathknight842 said:
Hello, I bought a SIM card from straight talk hoping to use it on my merge because I have seen people online that says I can do that as long as i have my SIM card unlocked. But after I got the card activated and put it in my phone it don't work. I try changing to GSM and using their APN but I have no signal, the mobile network just stays unchecked and I cannot check it. After a few minutes my phone suggests switching over to global mode and i do have mobile signal then but still no connection with anything. I called the straight talk woman and she told me it only works with AT&T or T-Mobile phones but it just don't make any sense to me that you have to have one of those previous carious just to get them as a new carrier? Am I missing something here?
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Click to collapse
Thanks to the helpful people over at 2fastroms and their quick response I found out that you have to have the 1.06.00.0910 verizon radio flashed to your system. You have to install the radio in the boot-loader and not the recovery menu, it took me a minute to figure that one out. Just informing anyone that has the same problem as me because I could not find it anywhere else on the web. Anyway credit to jianC for the help.

Unlocked T-Mobile Data and Reception Dropping in and Out

I picked up an unlocked T-mobile G5 and I'm using it for AT&T... The rep at the store applied the APN setting for ATT but I noticed after I got a new SIM installed and went home the reception and data connection started dropping in and out.
Basically, when the phone is sleeping and then I wake it starts searching for network then gets reception then get a signal for a couple mins then drops again and searches. Since it's a T-Mobile phone on an ATT network is there certain settings that I need to turn off like VoIP, WIFI calling etc? Any ideas?

Wipe out all existing APNs and start from scratch? Use the NXTGENPHONE APN. I'm using an unlocked T-Mobile H830 LG G5 on AT&T and I have no problems. My sister's Nexus 6 uses the same APN no problems either.
https://www.att.com/esupport/article.html#!/wireless/KM1062162

smartnphone said:
Wipe out all existing APNs and start from scratch? Use the NXTGENPHONE APN. I'm using an unlocked T-Mobile H830 LG G5 on AT&T and I have no problems. My sister's Nexus 6 uses the same APN no problems either.
https://www.att.com/esupport/article.html#!/wireless/KM1062162
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Click to collapse
So I followed your steps.. I wiped all existing APNs and entered the APN setting in the link you provided and used the NXTGENPHONE APN but I couldn't get data but just had reception to make calls. So I changed the name to AT&T and the APN name to phone and I get data and reception but it still drops in and out.
I went to ATT to see what they could suggest but the only thing they offered was maybe a faulty SIM card and switched it out but it's still doing the same thing... Has anyone experienced this? Should I do a factory reset maybe? If I do that, I won't lose SIM unlock right?

sguerra923 said:
So I followed your steps.. I wiped all existing APNs and entered the APN setting in the link you provided and used the NXTGENPHONE APN but I couldn't get data but just had reception to make calls. So I changed the name to AT&T and the APN name to phone and I get data and reception but it still drops in and out.
I went to ATT to see what they could suggest but the only thing they offered was maybe a faulty SIM card and switched it out but it's still doing the same thing... Has anyone experienced this? Should I do a factory reset maybe? If I do that, I won't lose SIM unlock right?
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Click to collapse
I was going to suggest a factory reset as a last resort. You won't lose the sim unlock; it's permanent unlock.
Troubleshooting is the name of the game and you'll have to keep having to try potential solutions until it's fixed.
Hopefully it's not a hardware issue with the radio or you'll have to swap it out and reunlock it all over again.

are you on 10A or 10D?
10D seems to improve the radio... but if you wan root/twrp make sure you do all that on 10A first before upgrading to 10D.
also, have you tested the phone in different areas? or just at your house and immediate area? perhaps it's just an issue in specific locations? what if you drive across town or something?

smartnphone said:
I was going to suggest a factory reset as a last resort. You won't lose the sim unlock; it's permanent unlock.
Troubleshooting is the name of the game and you'll have to keep having to try potential solutions until it's fixed.
Hopefully it's not a hardware issue with the radio or you'll have to swap it out and reunlock it all over again.
Click to expand...
Click to collapse
Performed a factory reset and issue is still there but slightly improved but I need to test it more... Basically, when I wake the phone it searches for network (not all the time but here and there) then locks a signal..

autoprime said:
are you on 10A or 10D?
10D seems to improve the radio... but if you wan root/twrp make sure you do all that on 10A first before upgrading to 10D.
also, have you tested the phone in different areas? or just at your house and immediate area? perhaps it's just an issue in specific locations? what if you drive across town or something?
Click to expand...
Click to collapse
In on 10D.. Yeah I tried it in different areas and driving when I'm art a stoplight I can see it searching for network.. I switched the SIM card and did a factory reset any other suggestions?

Is your Network mode set to GSM/WCDMA/LTE auto? If it's not area specific it might be hardware related.
How did you get the 10D update on AT&T btw?

smartnphone said:
Is your Network mode set to GSM/WCDMA/LTE auto? If it's not area specific it might be hardware related.
How did you get the 10D update on AT&T btw?
Click to expand...
Click to collapse
Yes, my network mode is set to that setting. The person I purchase this phone from had T-Mobile and updated before they sold it to me.

sguerra923 said:
Yes, my network mode is set to that setting. The person I purchase this phone from had T-Mobile and updated before they sold it to me.
Click to expand...
Click to collapse
Last thing to try is Mobile networks>Network operators>Search networks. Maybe manually choosing one might help? Enable Data Roaming?
Could be a hardware issue if not software.

smartnphone said:
Last thing to try is Mobile networks>Network operators>Search networks. Maybe manually choosing one might help? Enable Data Roaming?
Could be a hardware issue if not software.
Click to expand...
Click to collapse
Yeah, I tried that too.. Got back from Tmobile and they said that another person experienced the same issue couple weeks ago and they said that some G5s that are unlocked and used on different networks are still trying to jumping back on the tmobiles phone network hence my phone searching signals off and on...

Just wanted to give another confirmation that the LG-H830 works perfectly on AT&T (H83010D [BL,modem,system], rooted, unlocked). I gave up on Verizon and my fiancé now uses it on AT&T. She loves it!

Geez.. I got scammed. The person looks like they file a insurance claim on the phone so my ESN is blacklisted! Great! Lesson learned the hard way. Any suggestions what I can do? I saw that people are buying bad ESN phone on ebay as long as I post that it's a bad ESN.

OP, I had the exact same problem on T-Mobile after doing a temporary unlock. I took it to a T-mobile store and they tried swapping the SIM but that didn't help so they did a warranty replacement. Two days later I had a new phone and everything works again. I didn't (and won't) try to SIM unlock it again.
Sent from my LG-H830 using XDA-Developers mobile app

I have heard of people getting past blacklist. Think you can pay to fix it.
---------- Post added at 11:14 PM ---------- Previous post was at 11:13 PM ----------
Are you guys not changing the apns xml file????? Or enable roaming and setting rat to global?

jhasty01 said:
I have heard of people getting past blacklist. Think you can pay to fix it.
---------- Post added at 11:14 PM ---------- Previous post was at 11:13 PM ----------
Are you guys not changing the apns xml file????? Or enable roaming and setting rat to global?
Click to expand...
Click to collapse
I did some research online on blacklist repairs but do you or can anyone give me some recommendations on it? Sucks cause even if I get it repaired I wondering if I still will have issues with the reception..
Anyone tried this site? http://www.imeifix.com/

I just tried the sim unlock as well. I'm a tmobile customer so I really didn't have a reason to do it. Just wanted to see if it would unlock.
Well it said it could not be unlocked and I, out of dumb curiosity tried the temporary unlock. It worked and said it is unlocked until August. I think roughly 30 days after I did it.
Well, later that day or the next my phone started doing the same exact thing. Signal dropping and searching. Furthermore though, I woke up to a warm phone today. Same as it gets when doing lots of app updates. I unplugged it from the charger and watched the battery drop 4% in only 15 minutes of standby (screen off, not using the phone).
I just flashed it back to stock and relocked the boot loader and will see if it fixed it. Was running rooted 10d when this happened.
I'm starting to think that sim unlock app is evil or something. I haven't put my sim card back in as of yet but will update if it starts acting up when I do.
Possible explanation?:
I noticed a T-Mobile diagnostic app try to gain root access during the weirdness which I had never seen before. Maybe the sim unlock gains a sudo root to do the unlock but on a rooted phone with a non stock root manager causes the unlock app to endlessly loop trying to gain access and thus cause a warm phone and signal dropouts? Just a hunch but would be interested to see what others think.
*** Ok so quick update, I put my tmobile sim back in and the signal is dropping in and out again. The phone worked fine before I tried the unlock. This is so uncool.
Sent from my LG-H830 using XDA-Developers mobile app

I think I may have isolated the cause. I disabled the device unlock app in app settings and rebooted. Since then I haven't noticed the signal drop out.
EDIT: Yeah, that's a big nope. I'm still experiencing the problem after a total wipe and reflashing using LGUP refurbish mode. It's still dropping in and out, sometimes three times per minute. +1 to never use device unlock app.
I'm on stock unrooted 10d btw.
Oh, and the same SIM card works just fine in my older phones.
Sent from my LG-H830 using XDA-Developers mobile app

For what its worth, Att doesn't use the exact same bands as t Mobile....you might want to research some threads on the Att LG G5.

Problems with customized device and Sprint

I flashed the crDroid ROM onto my stock g7 Power, no problems. Flashed gApps and Magisk, everything ok. I did all of this while the device was unactivated and with the SIM card not in it. Everything works fine. But when I activated the device on the Sprint network and inserted the SIM card, I get no data. I know people have said you can manually edit the APNs in the Mobile Network settings, but the problem for me is, there is no APN option in that menu. However, when I remove the SIM card, I DO see the APN settings option there, but of course the whole menu is grayed out because the SIM card is removed. Has anyone else been able to customize and root one of these phones for use on the US Sprint network? Should I use a different ROM? Any suggestions would be helpful.

Tsuroshi said:
I flashed the crDroid ROM onto my stock g7 Power, no problems. Flashed gApps and Magisk, everything ok. I did all of this while the device was unactivated and with the SIM card not in it. Everything works fine. But when I activated the device on the Sprint network and inserted the SIM card, I get no data. I know people have said you can manually edit the APNs in the Mobile Network settings, but the problem for me is, there is no APN option in that menu. However, when I remove the SIM card, I DO see the APN settings option there, but of course the whole menu is grayed out because the SIM card is removed. Has anyone else been able to customize and root one of these phones for use on the US Sprint network? Should I use a different ROM? Any suggestions would be helpful.
Click to expand...
Click to collapse
Hey there... This is just a possibility...
A while back, I put my sister's CDMA sim into a custom Rom-ed phone. Couldn't add an APN for the life of me. And then, duh , it turns out it was because the phone radio was set on LTE/UMTS (auto)... Is your radio set for LTE/CDMA?

motolio said:
Hey there... This is just a possibility...
A while back, I put my sister's CDMA sim into a custom Rom-ed phone. Couldn't add an APN for the life of me. And then, duh , it turns out it was because the phone radio was set on LTE/UMTS (auto)... Is your radio set for LTE/CDMA?
Click to expand...
Click to collapse
Turns out it was on "LTE/CDMA/UMTS auto (PRL)". I changed it to "LTE/CDMA auto (PRL)" which is what the Sprint network uses, I'm pretty sure. That did seem to change some things, but I still don't see any APN settings and I still don't have data, unfortunately.* I think this ROM is just not set up to work on the Sprint network? Maybe I'll try flashing a different one.

Tsuroshi said:
Turns out it was on "LTE/CDMA/UMTS auto (PRL)". I changed it to "LTE/CDMA auto (PRL)" which is what the Sprint network uses, I'm pretty sure. That did seem to change some things, but I still don't see any APN settings and I still don't have data, unfortunately.* I think this ROM is just not set up to work on the Sprint network? Maybe I'll try flashing a different one.
Click to expand...
Click to collapse
Here's a how to video on getting a working apn in a device. Works perfectly on my end.

Tsuroshi said:
I flashed the crDroid ROM onto my stock g7 Power, no problems. Flashed gApps and Magisk, everything ok. I did all of this while the device was unactivated and with the SIM card not in it. Everything works fine. But when I activated the device on the Sprint network and inserted the SIM card, I get no data. I know people have said you can manually edit the APNs in the Mobile Network settings, but the problem for me is, there is no APN option in that menu. However, when I remove the SIM card, I DO see the APN settings option there, but of course the whole menu is grayed out because the SIM card is removed. Has anyone else been able to customize and root one of these phones for use on the US Sprint network? Should I use a different ROM? Any suggestions would be helpful.
Click to expand...
Click to collapse
Did you ever get it going? When I install Pixel Experience + I have no apns at all. Not in system/product/etc or product/etc which is where they are supposed to be located. So I just paste apn.conf.xml in the system/product/etc and set 0644 then go to networks and internet/mobile networks/access point names and hit reset to default and data's on , reboot afterwards and it's all fine. What's your model # on your device? Also are you sure your sim card isn't damaged? When they crack sometimes it's impossible to see with the naked eye. And technically you're not on Sprint anymore you're on T-Mobile because they finally finished the deal and Tmo now owns Sprint. (Which is a really good thing imo) ;p if and when you do get your issue resolved be sure and save your apn.conf.xml and upload it to Google drive or something so you'll have it if you need it again. I noticed that the first APN xml files I linked you to I had apn.config.xml for the name and that's not correct supposed to be apn.conf.xml My bad on that. Sometimes I drink a lot of coffee. [emoji41]
Sent from my [device_name] using XDA-Developers Legacy app

Is sprint already not cdma?

motolio said:
Is sprint already not cdma?
Click to expand...
Click to collapse
No nothing has changed at this time. Sprint's still CDMA
Sent from my moto g(7) power using XDA-Developers Legacy app

flash713 said:
No nothing has changed at this time. Sprint's still CDMA
Click to expand...
Click to collapse
All cdma phones go both ways since around 2015 cdma phones don't use sim card for calling or texting if u use the data then u use sim card aka gsm.Sprint is not going to change for at least 3 years on there current phone plans as for going to gsm only do not know as most companies are fashing out cdma cause it old tec .That is what I have found out from T-Mobile web sight

roadkill42 said:
All cdma phones go both ways since around 2015 cdma phones don't use sim card for calling or texting if u use the data then u use sim card aka gsm.Sprint is not going to change for at least 3 years on there current phone plans as for going to gsm only do not know as most companies are fashing out cdma cause it old tec .That is what I have found out from T-Mobile web sight
Click to expand...
Click to collapse
Please tell me more about CDMA also using GSM because they are two different technologies.. CDMA was used by USA military back in ww2 to send messages safely and GSM is what most the world uses. CDMA has always been more of a USA tech while GSM has always been pretty much what everyone else uses. They both send information in different ways. They do not work the same or together far as I know.
If you want to be more compatible with development use a GSM carrier like Metro, T-Mobile because GSM is what still rules the world far as phone tech goes. And we here in the USA only make up a small piece of the world far as development goes.