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[Q] 3G does not work 4G fine

Today as soon as I left a 4G area my 3G does not work. I tried everything and I get no internet connection with 3G or 1X. When I go back into a 4G area it works fine. But if I move back into a 3G area I get no internet connection. Do you think my CDMA modem is fried?

Im having a problem with mine in general where as my thunderbolt was fine. Either I have nothing, 3g and most of the time no 4g. Headed to verizon after lunch.

It's most likely your SIM card. Had the same issue and ended up with a replacement phone for no reason. Go get a new SIM from VZ and try it.

This solution may work but definitely couldn't hurt to try. I had the same problem you seem to be having, and flashed all roms and versions of software and still only 4G would work. I thought the 3G was fried and seen very few alternatives online besides new SIM or new phone. Saddened I went to bed with battery out and SIM out and as soon as I popped them in the next morning, 3G was normal and has been normal for weeks now. I can't explain it but it more than likely has something to do with the SIM card like everyone else is saying.

Dont know why but after a few days it actually started working. Thanks to all who tried to help.

Im in a 3g only area right now. Never really had the no data problem, but suddenly I am and my phone freaks out and I sometimes lose signal for 20 mins. I'm pretty sure someone from verizon said told me not to take out the sim card
Sent from my SCH-I510 using XDA App

I had sim card replaced and its still screwed getting replacement sent. They also had me do all kinds of other whack stuff that didnt work.

I lost 3g/internet also and tech support was going to send me another phone, but I tried the new sim card and Bingo. It worked! Thanks for the post, it saved me from having to flash my phone back to stock"for the warranty."

I did all the things they said to do, sim card,format sd card several times and new gmail account. Got replacement phone in and everything is working great so far.

[Q] Crazy situation, if anyone want to take a stab at this?

I did an ODIN flashed Gummy_GBE1.9RC1 Rom and then did a CWR flash of the MinimalGummyGBv2.0 theme over. When I went to My Verizon to switch over from my Incredible 2 to my Charge but only the SIM card registered. So now I can access 4G and get online but I can't make phone calls or send SMS/MMS over 1X or 3G.
I called Verizon they said play the waiting game. I've waited for 24 hours, activated my Incredibe again (successfully) then tried the Charge again, multiple times, (different SIMs) with no prevail, still only recieving 4G.
I just flashed the EP1W modem, and got the same results as before...
VZW then suggested a wipe... Took so long to get it the way I wanted it. lol
Just wondering if anyone else has had this happen or heard about it before?

mozes316 said:
I did an ODIN flashed Gummy_GBE1.9RC1 Rom and then did a CWR flash of the MinimalGummyGBv2.0 theme over. When I went to My Verizon to switch over from my Incredible 2 to my Charge but only the SIM card registered. So now I can access 4G and get online but I can't make phone calls or send SMS/MMS over 1X or 3G.
I called Verizon they said play the waiting game. I've waited for 24 hours, activated my Incredibe again (successfully) then tried the Charge again, multiple times, (different SIMs) with no prevail, still only recieving 4G.
I just flashed the EP1W modem, and got the same results as before...
VZW then suggested a wipe... Took so long to get it the way I wanted it. lol
Just wondering if anyone else has had this happen or heard about it before?
Click to expand...
Click to collapse
I don't quite understand what's going on here with the My Verizon and and Incredible 2?? you had a Charge that you flashed all that to and then tried to switch phones?

When I was first starting with flashing I accidently checked "EFS CLEAR" once. That was real interesting, it caused me to lose all data services like net connection, but still let me make phone calls. I find it very interesting that your problem seems to be the complete opposite. I figured that one out after a while, but if your problem is with phone calls and texts with data working I don't think my solution would help you.
IMO you should just suck it up and odin back to stock, including the charge.pit file, and see if the problem remains.

mozes316 said:
I did an ODIN flashed Gummy_GBE1.9RC1 Rom and then did a CWR flash of the MinimalGummyGBv2.0 theme over. When I went to My Verizon to switch over from my Incredible 2 to my Charge but only the SIM card registered. So now I can access 4G and get online but I can't make phone calls or send SMS/MMS over 1X or 3G.
I called Verizon they said play the waiting game. I've waited for 24 hours, activated my Incredibe again (successfully) then tried the Charge again, multiple times, (different SIMs) with no prevail, still only recieving 4G.
I just flashed the EP1W modem, and got the same results as before...
VZW then suggested a wipe... Took so long to get it the way I wanted it. lol
Just wondering if anyone else has had this happen or heard about it before?
Click to expand...
Click to collapse
if nothing's working you may want to follow kamikazemikes option below and get to EE4 stock and have VZ give you a new 4G sim card or a replacement phone... it happens a lot so you shouldn't have a problem doing that
kamikazemike6 said:
When I was first starting with flashing I accidently checked "EFS CLEAR" once. That was real interesting, it caused me to lose all data services like net connection, but still let me make phone calls. I find it very interesting that your problem seems to be the complete opposite. I figured that one out after a while, but if your problem is with phone calls and texts with data working I don't think my solution would help you.
IMO you should just suck it up and odin back to stock, including the charge.pit file, and see if the problem remains.
Click to expand...
Click to collapse

When I first got my charge I wasn't able to send messages. I restarted mt phone and it fixed the problem. Idk if that will help or not bit it's with a shot if you haven't yet.
Sent from my SCH-I510 using XDA App

Well, turns out it just needed a *22899 :-( of course I figured this out after wiping and reinstalling the ROM. Getting and making phone calls but I can't text over 1X... lol Always something.
Sent from my SCH-I510 using XDA App

[Q] Sim driver?

So i tried rooting my phone using debloated_deodexed_ep4d.tar.md5.
I took out the sim card during the process, even have a friends charge to test something from doing this before. I found out that some how after the flash the phones sim card slot stops working ive tried many other roms and modems to try getting it to work is anyone able to tell me why it would stop working does anyone have the working piece i need to get it to work again?

If you tried other roms, with the same result, then you need to get your phone exchanged.it isn't a dover issue if it happens with all roms.

xfallenxcripplex said:
So i tried rooting my phone using debloated_deodexed_ep4d.tar.md5.
I took out the sim card during the process, even have a friends charge to test something from doing this before. I found out that some how after the flash the phones sim card slot stops working ive tried many other roms and modems to try getting it to work is anyone able to tell me why it would stop working does anyone have the working piece i need to get it to work again?
Click to expand...
Click to collapse
Call verizon and get to second level of technical support. They can send something to your sim that displays "updating sim" on your screen.Not saying this will fix your issue but it worked for me on a similar situation. first thing tech guy asked was "you have 4g phone?" Than he sent the info.
Sent from my SCH-I510 using xda premium

i rooted my phone as soon as the first debloated rooted+voodoo came out and that installed fine but i liked having some of the features they got rid of and was a little buggy and ive tried two different debloated rooted roms they might be different but they seem to look the same and i cant do the sim update because i live in alaska where they have no "verizon" towers just leased towers or whatever from another cell leader in our area but suck for cell phone choices and only recently became price comparative. well i was hoping id get a programmer or someone that could help or someone who has an exact copy but i lost my job so i had to turn off my phone anyways better to stay local anyways. i just put my service on pause still have the unlimited package why i wanted to get root back on my phone

[Q] do i need the sim card to root + rom a phone?

basically the GF was super frustrated with her infuse....
constant loop reboots, gps radio awful, calls dropped, etc
so we tried to work with ATT - got new battery, got new phone
at this point she's fed up and put her sim card in her old blackberry
trying to help her out i'll put a different rom/kernel on the phone to see if it'll help -
but do i need her sim in there to do so? i can't imagine it is necessary but figure'd I'd ask before I brick it

Nope, you will be ok without it.

thank you very much

No 4G

so I'm loving the new phone been flashing all the roms thought i messed up my IMEI but I'm good cause its back and looks normal. But ever since I flashed CM9 and did a battery pull during activation (I know I know) I no longer get 4G on my phone. when i switch it manually to 4G with Phone Info I can get data and go on web, but when I go to make calls it says I can not because no coverage.
I called VZW today, and got my up to 2ed teir, and they said that this is known issue with the SG3 and there are many complaints, and they are working with Samsung to correct this and said a software update will be coming out to fix this.. has any one else experienced this? I'm thinking I need a new sim?

has anyone been able to fix this, I looked at my radio and its not the most recent version... could this be causing the issue

i got best buy to replace my gs3 because of no 4g, i still was within my 30 day return period though... pretty sure i could of used phone info to fix it back to 4g, i didn't try because i wanted a new gs3, never had any issued connecting to 4g with new gs3, exept when i play around with cm10 or other jelly bean roms

I lost my 4G connection last night and most of today, ended up flashing a stock rom (then lost all data connection) drove all the way to the verizon store to get a new sim card, put the phone into airplane mode and when it came out of that i had full connection again. Not sure what caused it.

tprouty said:
so I'm loving the new phone been flashing all the roms thought i messed up my IMEI but I'm good cause its back and looks normal. But ever since I flashed CM9 and did a battery pull during activation (I know I know) I no longer get 4G on my phone. when i switch it manually to 4G with Phone Info I can get data and go on web, but when I go to make calls it says I can not because no coverage.
I called VZW today, and got my up to 2ed teir, and they said that this is known issue with the SG3 and there are many complaints, and they are working with Samsung to correct this and said a software update will be coming out to fix this.. has any one else experienced this? I'm thinking I need a new sim?
Click to expand...
Click to collapse
I have 2 Galaxy S3 and they both did the same thing when I switched the sim cards, I cannot get back to 4G
and I AM NOT EVEN ROOTED, thats sad very sad

I had a similar issue when using a third party 3g toggle in Quicker. Ever since then no data or vice capabilities.

sorry - did not know anyone was posting here, I started posting in the one in Q&A... There are too many 4G threads!
I fixed mine by getting a new sim card.

tprouty said:
sorry - did not know anyone was posting here, I started posting in the one in Q&A... There are too many 4G threads!
I fixed mine by getting a new sim card.
Click to expand...
Click to collapse
I'm not experiencing no 4g, but I am experiencing a horrible connection.... This is my second gs3. My first one did not experience these connection issues, and I'm pretty sure I'm using the same sim card (I exchanged it at the store and wasn't paying attention when they were setting it up...).
Maybe I have another faulty device?

Kreeker said:
I'm not experiencing no 4g, but I am experiencing a horrible connection.... This is my second gs3. My first one did not experience these connection issues, and I'm pretty sure I'm using the same sim card (I exchanged it at the store and wasn't paying attention when they were setting it up...).
Maybe I have another faulty device?
Click to expand...
Click to collapse
I would start with a new sim, just walk into a store and say you are having connection issues and vzw said to get a new sim

No 4G fix - you've punked you SIM card!
tprouty said:
so I'm loving the new phone been flashing all the roms thought i messed up my IMEI but I'm good cause its back and looks normal. But ever since I flashed CM9 and did a battery pull during activation (I know I know) I no longer get 4G on my phone. when i switch it manually to 4G with Phone Info I can get data and go on web, but when I go to make calls it says I can not because no coverage.
I called VZW today, and got my up to 2ed teir, and they said that this is known issue with the SG3 and there are many complaints, and they are working with Samsung to correct this and said a software update will be coming out to fix this.. has any one else experienced this? I'm thinking I need a new sim?
Click to expand...
Click to collapse
onpoint10101 said:
i got best buy to replace my gs3 because of no 4g, i still was within my 30 day return period though... pretty sure i could of used phone info to fix it back to 4g, i didn't try because i wanted a new gs3, never had any issued connecting to 4g with new gs3, exept when i play around with cm10 or other jelly bean roms
Click to expand...
Click to collapse
tprouty said:
sorry - did not know anyone was posting here, I started posting in the one in Q&A... There are too many 4G threads!
I fixed mine by getting a new sim card.
Click to expand...
Click to collapse
Easy fix (just copied from a post elsewhere): save everything you have open, pop up your dialer, and type *2767*3855# - which resets (it says "Reformat" on an ugly red screen that flashes by in a heartbeat, just go with it) your SIM card and therefore your 4G capabilities. It will immediately reboot and - "tada", you have 4G service again.

ratledge said:
Easy fix (just copied from a post elsewhere): save everything you have open, pop up your dialer, and type *2767*3855# - which resets (it says "Reformat" on an ugly red screen that flashes by in a heartbeat, just go with it) your SIM card and therefore your 4G capabilities. It will immediately reboot and - "tada", you have 4G service again.
Click to expand...
Click to collapse
copied form the IMEI backup thread right? I did this and it did not work for me, the only thing that worked was getting a new SIM.

Just trying to help narrow down why people are getting this. Just posted this http://forum.xda-developers.com/showthread.php?p=30913011#post30913011
In the other "No 4G" thread. Anyone who loose their 4G use lucky patcher and TiBu?