Database Info

G2x Data Issues (No 3G or 4G)

Hello i just picked up the G2X phone today and upon leaving the store the phone had begun to have data issues. Meaning it was not keeping its connection, which left me with no functionality to the internet.
See youtube video i posted:
http://www.youtube.com/watch?v=xqWa7gQ94Us

How old is your similar card?
Sent from my LG-P999 using XDA Premium App

sk337sk337 said:
How old is your similar card?
Sent from my LG-P999 using XDA Premium App
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Click to collapse
What card are you referring to?

gamecheif said:
Hello i just picked up the G2X phone today and upon leaving the store the phone had begun to have data issues. Meaning it was not keeping its connection, which left me with no functionality to the internet.
See youtube video i posted:
http://www.youtube.com/watch?v=xqWa7gQ94Us
Click to expand...
Click to collapse
No such issues or complaints on this. Were you on wifi in the store?
Sent from my LG-P999 using XDA Premium App

No, wifi wasn't enabled in the store. As a matter of fact, i actually tried to use the wifi when 4G begun having data issues and was unable to find any networks.

Mine has randomly disconnected from 4G as well, although the status bar still shows it connected. If I restart the phone it comes back on.
I think it may have something to do with toggling on wifi, but it has also happened after just sitting idle for an extended period, and wont come back on.

jink25 said:
Mine has randomly disconnected from 4G as well, although the status bar still shows it connected. If I restart the phone it comes back on.
I think it may have something to do with toggling on wifi, but it has also happened after just sitting idle for an extended period, and wont come back on.
Click to expand...
Click to collapse
Well, I think LG should of did a lot more QC before they even though about dropping this phone on the shelves. There is also a lot of little stuff that this phone is just not doing that my optimus T did flawlessly.

I'd have to agree. I'd recommend having your sim card replaced to see if that helps.
Sent from my HTC Vision using XDA App

Had the same issue. Out was my sim card. I had been using my original card which wasn't compatible with the new technology. Once I put in the new card it was all good.
XDA Mobile

Docavelli said:
Had the same issue. Out was my sim card. I had been using my original card which wasn't compatible with the new technology. Once I put in the new card it was all good.
XDA Mobile
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Interesting ill tell you how i was able to get the phone. I was actually on flex pay the TM rep ported my number to a new line on our family line. Before that happened i was using a different number that wasnt attached to the sim card i am using now and 4G internet was working correctly on that sim card.But, Now that you have stated your issue. i think im going back to the tmobile store and see if they can get a new sim card for me.

So I'm not the only one with the network issue. seems like as soon as I disconnect from wifi I lose network connectivity. I still see my signal but can't access the internet at all. Totally locks up until I reboot. Which is proving to be a pain in the butt.
I'm going to t-mobile today to get a new sim card to see if that changes anything, mine is currently from Oct 28th 2008. The day the G1 was first released. Can't even read the numbers anymore. But to my knowledge the cards haven't changed. Guess I'll see if this fixes the issue.
Sent from my LG-P999 using XDA Premium App

I get real sluggish results from my g2x, my nexus one ran fine...
I am going to try the sim card and see if that fixes it.

luckycook82 said:
So I'm not the only one with the network issue. seems like as soon as I disconnect from wifi I lose network connectivity. I still see my signal but can't access the internet at all. Totally locks up until I reboot. Which is proving to be a pain in the butt.
I'm going to t-mobile today to get a new sim card to see if that changes anything, mine is currently from Oct 28th 2008. The day the G1 was first released. Can't even read the numbers anymore. But to my knowledge the cards haven't changed. Guess I'll see if this fixes the issue.
Sent from my LG-P999 using XDA Premium App
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That is the way it is designed. When you have WiFi on, it disables your Cellular data to save power. Hence why the 4G icon disappears.
When you disable WiFi, it has to reenable the Cellular Data. So it takes a sec.
Now if it NEVER comes back then there is a problem. But don't expect it to be instantaneous.

player911 said:
That is the way it is designed. When you have WiFi on, it disables your Cellular data to save power. Hence why the 4G icon disappears.
When you disable WiFi, it has to reenable the Cellular Data. So it takes a sec.
Now if it NEVER comes back then there is a problem. But don't expect it to be instantaneous.
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Click to collapse
When I have wifi on, the 4g icon still comes on and off constantly. When wifi is off, 4g icon still blinks on then off constantly. Still don't have any data. New sim card didn't help either. I go through a battery in about 4 hours because its constantly connecting and disconnecting to the network.
LG sucks.

I'm pretty much convinced this is related to Wifi calling. Try disabling that (this will also help your battery life something serious - take a look at devices logs when wifi calling is enabled.)

luckycook82 said:
So I'm not the only one with the network issue. seems like as soon as I disconnect from wifi I lose network connectivity. I still see my signal but can't access the internet at all. Totally locks up until I reboot. Which is proving to be a pain in the butt.
I'm going to t-mobile today to get a new sim card to see if that changes anything, mine is currently from Oct 28th 2008. The day the G1 was first released. Can't even read the numbers anymore. But to my knowledge the cards haven't changed. Guess I'll see if this fixes the issue.
Sent from my LG-P999 using XDA Premium App
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When I upgraded my G1 to my G2x, they said they had to give me a new SIM card because the old one won't do 4G. According to the sales person I spoke with, you will need a new SIM card.

Can you keep your old number with a new sim card? My sim card is the same one from my first phone, nokia 3390

I'm having the same problem.. I used a new sim card and I still can't get any 3G or 4g for that matter.. Any ideas or is my phone defective??

j0hnee said:
I'm having the same problem.. I used a new sim card and I still can't get any 3G or 4g for that matter.. Any ideas or is my phone defective??
Click to expand...
Click to collapse
Then a lot of phones are defective
Sent from my LG-P999 using XDA App

i believe all the phones come with the setting already on GSM Only. YOU NEED TO CHANGE IT TO GSM-WCDMA AND YOU WILL GET YOUR 4G SERVICE TRUST ME IT WORKED FOR ME, SO GO INTO WIRELESS SETTINGS AND TAKE OFF THE GSM ONLY SETTING

[Q] G2X 4G Problems

I've had this phone since release and have loved it. I have only one issue with it. I'll be trying to use my internet on the phone and it will show the upload arrow but the download will never do anything. I have full signal so this is not the problem. This happends a lot and in the middle of browsing it will do it... It will load a page and I'll click a link and it wont load and then it will work again after awhile. Does anyone else have this problem? Does anyone know a fix or the reason its doing this. Also I have full 4G coverage where I am.

It happens to me a lot too! Its very inconvenient and I know its not the area where I reside because I also have a g2 on my spare line and the g2s data works perfectly fine when the g2xs is stalling. :/
Sent from my LG-P999 using XDA App

Did you get yours at release? If so it may just be the first batch or something...

Could be lots of things. Have you activated and are using the SIM that came with the phone. Supposedly the G2x uses a new SIM format.
What OS are you running? Are you on WiFi? 2G, 3G, 4G? Where does this occur?
I surf my with my phone a lot and I don't get that intermittent data problem you are describing. I am running the latest CM7 (#70) and in a 3G area with average signal quality.

I'm using the SIM that came with the phone and this is only on 4G I reverted back to stock ROM unrooted and still has the problem

I've never rooted my phone. I've actually swapped the sim twice already thinking it was the problem. Hard reset has been done. I've pretty much tried every trick in the book and the problem still persists. Its my 2nd replacement(1st one had the same issue)
Sent from my LG-P999 using XDA App

P.s I got the first one at release then had it exchanged(buyers remorse period) for a new one towards the end of may so I doubt the 2nd one was from the first batch.
Sent from my LG-P999 using XDA App

Like Player said, could be alot of things. For a sim, the G2x does not require a brand new sim, but it does require a newer sim. If your sim is older than 18 months, put in the one that came with the phone. Last years TMOBILE sim will work with the G2x.
Also, data plan. Didn't happen to me, but did happen to my son, the plan was not enabled for 4g Android. He got signal, rarely 4g...but did get 2g.3g. Walked back in the store..asked what was up...they checked...1 mouse click and finished. Funny thing was, he bought the phone from them, earlier in the day. You would have thought they would have covered that.

alodar1 said:
Like Player said, could be alot of things. For a sim, the G2x does not require a brand new sim, but it does require a newer sim. If your sim is older than 18 months, put in the one that came with the phone. Last years TMOBILE sim will work with the G2x.
Also, data plan. Didn't happen to me, but did happen to my son, the plan was not enabled for 4g Android. He got signal, rarely 4g...but did get 2g.3g. Walked back in the store..asked what was up...they checked...1 mouse click and finished. Funny thing was, he bought the phone from them, earlier in the day. You would have thought they would have covered that.
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Click to collapse
Your sons phone was showing 3g? Hmm... I thought on tmo 4g was a fast version of 3g and that the g2x only showed 2g or 4g. I am probably misunderstanding something.

So I went to T-Mobile just now and they gave me a new SIM and it fixed all the problems so if anyone else is having trouble try getting a new SIM first....its free
Sent from my LG-P999 using XDA App

No 4G since the update

I applied the update late Friday night and have not been able to get a 4G signal since. I'm normally in a strong 4G area and had not had any problems like this in the past except for the nationwide outage of course.
I've tried battery pulls, toggling LTE off and on and even did a factory reset. I then talked to tech support and they did a few things on their end that were unsuccessful. They then told me to get a new SIM card but once again, no luck.
Tech support is at a loss to explain what is going on and has escalated it to the higher level of support. It can take up to a week for them to get to a ticket so I guess I'm SOL until they take a look at it.
Anybody else having 4G problems since the update?

I haven't applied the update but have been stuck in 1X all day as well. I also pulled the battery, switched back and forth on Rev A, and toggled LTE. Nothing. Was going to revert back to a saved ROM next. My wife's phone happily receives 3G.

Did the update Friday night and 4G is as strong as ever.
Sent from my Verizon 4GLTE HTC THUNDERBOLT

My 4g is also working. What is weird is when I loaded a ROM I lost all signal. I loaded another Rom and nothing. I had to load radio file in hboot and I was back in business.

yea in such circumstances I had reflashed the radio and it works just fine, give it a shot

Received a replacement today, popped in the SIM card and am back to 4G. No idea what happened but the update is definitely to blame.

Yeah I got mess up too with the new update. Had to get a new simcard today and it work ok.

4G working just fine for me also

jmz768 said:
Received a replacement today, popped in the SIM card and am back to 4G. No idea what happened but the update is definitely to blame.
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Click to collapse
glad you got it worked out. I would have reflashed just the radio to try and fix it.

Having this issue as well since yesterday (7/11). Loaded Th3ory 5.0 with the newest radio to two different Tbolts (mine and a coworkers) and we're both experiencing the same issue. Flashed different versions of the radio, including the newest one again and had 4G come back for a short period of time before all service was gone again. Not sure if its an issue with Th3ory rom itself and since I cant post in that thread until I make a few more spam posts about nothing to get my post count up, I figured I'd post it here.
in Mid-town NYC where 4g has never been an issue before.

I should add that I wasn't rooted.

What happens if you're Rooted and running a custom ROM and you do a SIM Card pull? I really want to try this method, but i'm scared this will force my phone to download the new OTA update and that i'll either brick my phone or run into some serious issues.

I have had trouble for the last two days getting 4G, never had a problem before.
Orange County, CA area.
BAMF remix 1.8.6 w/2.5 radio.

Dyerseve3160 said:
Having this issue as well since yesterday (7/11). Loaded Th3ory 5.0 with the newest radio to two different Tbolts (mine and a coworkers) and we're both experiencing the same issue. Flashed different versions of the radio, including the newest one again and had 4G come back for a short period of time before all service was gone again. Not sure if its an issue with Th3ory rom itself and since I cant post in that thread until I make a few more spam posts about nothing to get my post count up, I figured I'd post it here.
in Mid-town NYC where 4g has never been an issue before.
Click to expand...
Click to collapse
don't think anyone else is having problems. Might be network issues in your area. Just flashed gingertheory 5.0 yesterday with the new stock 2.0 radio from the update and no problems.

I am having the same issues 4g is gone and only stuck on 1x

Make sure you check your sim and battery cover.
Sent from my ADR6400L using XDA Premium App

kuwlness said:
What happens if you're Rooted and running a custom ROM and you do a SIM Card pull? I really want to try this method, but i'm scared this will force my phone to download the new OTA update and that i'll either brick my phone or run into some serious issues.
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Click to collapse
You dont need to pull out the sim card, pulling the battery is good enough. All it does is update the PRL.

nrfitchett4 said:
Make sure you check your sim and battery cover.
Sent from my ADR6400L using XDA Premium App
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Yeah just tried battery pull etc.. no luck uggh thnx though
Sent from my ADR6400L using XDA App

I'm also off 4g since update... They are sending new sim card hope it works... OTA went w/o hitch... But no 4g... Would modem reset help?
Sent from my ADR6400L using XDA App

I'm in the same boat.... I used to get 3-4 bars of 4G service at my home, now after the update I barely get 1 bar of 3G service. I have to force the phone to lock onto 4G by choosing LTE only.
Sent from my ADR6400L using Tapatalk

So frustrated, about to return One X but seeking advice

All,
I have had the One X for just over a week now. Three times, I have had to hard reset the phone because it stops receiving / making calls, and data stops.
I tried searching the forums but it seems like issues are all over the board and couldn't really find something that was exactly my issue. If there is one, I apologize for the duplicate post.
Regardless, when the phone is in this state, it appears like everything is working. It shows I have great signal, the little 4G icon is there, indicating that everything is working.
Anyone else have this problem or could I possibly just have a bad unit? AT&T already swapped out the SIM card thinking that might fix it, but no luck.

Wintrmte said:
All,
I have had the One X for just over a week now. Three times, I have had to hard reset the phone because it stops receiving / making calls, and data stops.
I tried searching the forums but it seems like issues are all over the board and couldn't really find something that was exactly my issue. If there is one, I apologize for the duplicate post.
Regardless, when the phone is in this state, it appears like everything is working. It shows I have great signal, the little 4G icon is there, indicating that everything is working.
Anyone else have this problem or could I possibly just have a bad unit? AT&T already swapped out the SIM card thinking that might fix it, but no luck.
Click to expand...
Click to collapse
I think you should swap out the phone as bad before returning it if that's the only issue you're having. mine seems flawless in that regard. I haven't missed or dropped a single call.

gunnyman said:
I think you should swap out the phone as bad before returning it if that's the only issue you're having. mine seems flawless in that regard. I haven't missed or dropped a single call.
Click to expand...
Click to collapse
Thanks for the suggestion, I'll give that a go.

Definitely return it for new one...that problem is one I have not heard of and will probably go away once you have the new one. Good luck...badass phone for sure.
Sent from my HTC One X using Tapatalk 2

what the hell I just took my HOX out of my pocket and it's stuck on edge!

might be the service AT&T

gunnyman said:
what the hell I just took my HOX out of my pocket and it's stuck on edge!
Click to expand...
Click to collapse
I don't recall ever having that problem. Mine was pretty random too, in fact it got so bad yesterday that I missed several important calls.
If I would restart the phone, I would get all my missed text messages and the voicemail (google voice) would tell me I have messages waiting..
Very frustrating.

aznrecon said:
might be the service AT&T
Click to expand...
Click to collapse
I thought that might be my problem too, but where I could stand in one place and have the problem, restart the phone, and then not have the problem -- that leads me to believe there was something wrong with the phone.

aznrecon said:
might be the service AT&T
Click to expand...
Click to collapse
Nope the wife's inspire stayed on hspa

My X started out ok, but these last couple of days I have NO signal anywhere. Also SMS/MMS is barely working. (and when it does, people are getting multiples) And its dropping pretty much every single call.
I just called my corp store, they have plenty in stock. I'm going to go exchange it. Should I ask for a new SIM also?
And my screen is perfect, here's hoping I get another good one...

powerwagon said:
Definitely return it for new one...that problem is one I have not heard of and will probably go away once you have the new one. Good luck...badass phone for sure.
Sent from my HTC One X using Tapatalk 2
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Click to collapse
Good luck getting to get a new one. I need to swap mine too but doesn't look like there will be anymore stock
Sent from my HTC One X using XDA Premium HD app

gunnyman said:
Nope the wife's inspire stayed on hspa
Click to expand...
Click to collapse
However, AT&T's LTE phones are notorious for connection problems on non-LTE market. These LTE phones use a new APN called pta. I just had the same problem while traveling through PA yesterday. Lost data connections many times and had to reboot the phone at the end of the day to regain data connection of any kind.
So, it is AT&T's service and also the phone firmware that can't properly handle the fact that it can't receive any LTE signal in certain areas.

foxbat121 said:
However, AT&T's LTE phones are notorious for connection problems on non-LTE market. These LTE phones use a new APN called pta. I just had the same problem while traveling through PA yesterday. Lost data connections many times and had to reboot the phone at the end of the day to regain data connection of any kind.
So, it is AT&T's service and also the phone firmware that can't properly handle the fact that it can't receive any LTE signal in certain areas.
Click to expand...
Click to collapse
return it and get another phone, besides the One X, it's all hype anyway. The HTC vivid is a much more solid phone.

I had almost the same issue. My device was on wifi and would at random times just stop pulling data. Or at time just not make calls. I tried trouble shooting it but I was basically told since I didn't have it long I should get it replaced. I replaced it and the new device is perfect. I have not once had that issue again.

djfrost40 said:
return it and get another phone, besides the One X, it's all hype anyway. The HTC vivid is a much more solid phone.
Click to expand...
Click to collapse
Who said I'm going to reture it. OneX, regardless all its problems is still way better than any alternatives AT&T have. There is no such thing as problem free Android phones. I've being many of them. They all have problems one way or another. Vivid with its ancient S3 CPU and SD screen just plain sucked. My SGS2 can kick its butt.
For me the form factor of One X, LTE speed, S4 processor and HD screen are the main things I pick One X over any other phones available on AT&T. These software bugs will be corrected overtime.

I just came back from my store. They had plenty in stock but said when that runs out, they have no idea when they will see anymore.
I have a brand new 1X, and a new SIM card. Hopefully this one works.

I stopped by a vzw store to look at the gnex and my hox side by side. I've decided to keep the HOX. Screen on the gnex was way too bright and I ran quadrant side by side on both phones. The hox blew the gnex out of the water.

Wintrmte said:
All,
I have had the One X for just over a week now. Three times, I have had to hard reset the phone because it stops receiving / making calls, and data stops.
I tried searching the forums but it seems like issues are all over the board and couldn't really find something that was exactly my issue. If there is one, I apologize for the duplicate post.
Regardless, when the phone is in this state, it appears like everything is working. It shows I have great signal, the little 4G icon is there, indicating that everything is working.
Anyone else have this problem or could I possibly just have a bad unit? AT&T already swapped out the SIM card thinking that might fix it, but no luck.
Click to expand...
Click to collapse
Bought mine yesterday and this same issue happened to me today. Had full reception on 4G but could not send a text or place a call. Happened twice today, and I dont know if I want to return it ASAP or if its software related and may be fixed.

I had that problem 3 days after buying the phone. Data, calls, texts..tons of problems. Phone was unusable half the time. I went and exchanged it for another one. I am now at 6 days with the new phone. No problems. I hope it lasts.

potential signal problem

Hey everyone, i'm a new coming from the OG razr and while i heard the radio on the s3 isn't as good as the razr i think my phone might have a problem. It seems to get stuck on 1x a lot and the only way to get back to 4g is to restart the phone. my phone is rooted but stock rom. Is this a common problem? Also under under APN LTE verizon internet is checked not EHRPD. Is this correct?

topaz330 said:
Hey everyone, i'm a new coming from the OG razr and while i heard the radio on the s3 isn't as good as the razr i think my phone might have a problem. It seems to get stuck on 1x a lot and the only way to get back to 4g is to restart the phone. my phone is rooted but stock rom. Is this a common problem? Also under under APN LTE verizon internet is checked not EHRPD. Is this correct?
Click to expand...
Click to collapse
Its not normal. Take it back before your 14 day period and they'll give you a brand new one for it. If you wait then you'll just get a refurb.
Sent from my SCH-I535 using xda app-developers app

Vorfidus said:
Its not normal. Take it back before your 14 day period and they'll give you a brand new one for it. If you wait then you'll just get a refurb.
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
is unrooting as easy as rooting? I'm hoping theres a script or program that can unroot as I'm not the most tech savvy. I'm guessing if i'm bringing it back i'll need to unroot.

topaz330 said:
is unrooting as easy as rooting? I'm hoping theres a script or program that can unroot as I'm not the most tech savvy. I'm guessing if i'm bringing it back i'll need to unroot.
Click to expand...
Click to collapse
You know how to use Odin? Look at section two, "how to get back to stock from any rom."
http://forum.xda-developers.com/showthread.php?t=1762709
Sent from my SCH-I535 using xda app-developers app

dont know how to use odin but the instructions seems easy enough. Just got off the phone with CS and they tell me its most likely the sim card and not the phone and to go to a store to replace it. Is it true that the sim card actually controls the signal?

topaz330 said:
dont know how to use odin but the instructions seems easy enough. Just got off the phone with CS and they tell me its most likely the sim card and not the phone and to go to a store to replace it. Is it true that the sim card actually controls the signal?
Click to expand...
Click to collapse
Yeah it's true, put simply. You can see if it's the sim. But like I said, if you try to get a replacement after your return period, then you'll just get a refurb. So be quick on the draw if the sim card doesn't fix it.
Sent from my SCH-I535 using xda app-developers app

My s3 isn't having that bad of issues but still some bad data reception. Is Samsung going to do any updates or is it just going to be like this permanently

bby144 said:
My s3 isn't having that bad of issues but still some bad data reception. Is Samsung going to do any updates or is it just going to be like this permanently
Click to expand...
Click to collapse
S3s are known to have a number of data issues. Call technical support and try their ideas. When you can rule everything else out, then you know it's your phone. Basically, if a new sim or a factory reset doesn't fix it, you need a new phone.
Sent from my SCH-I535 using xda app-developers app

Vorfidus said:
S3s are known to have a number of data issues. Call technical support and try their ideas. When you can rule everything else out, then you know it's your phone. Basically, if a new sim or a factory reset doesn't fix it, you need a new phone.
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
Alright, I sent them an email and will probably call them if it starts to get worse.

topaz330 said:
dont know how to use odin but the instructions seems easy enough. Just got off the phone with CS and they tell me its most likely the sim card and not the phone and to go to a store to replace it. Is it true that the sim card actually controls the signal?
Click to expand...
Click to collapse
I took my phone in the store yesterday and they told me flat out that I sim card won't do anything for your signal. I'm not discounting what you're saying, just telling you guys what they told me.
My signal is garbage at home AND at work. I use wifi at home to play with the phone but actual 3G signal is bad. I am lucky to get 2 bars but its generally 1 with speed tests of about 80kbps.
I don't have WIFI at work, and get no signal at all.
I still have a week to return the phone but I'd like to keep it if I can get a better signal.
I am still within my 14 day, maybe 5 days left

Garrett67 said:
I took my phone in the store yesterday and they told me flat out that I sim card won't do anything for your signal. I'm not discounting what you're saying, just telling you guys what they told me.
My signal is garbage at home AND at work. I use wifi at home to play with the phone but actual 3G signal is bad. I am lucky to get 2 bars but its generally 1 with speed tests of about 80kbps.
I don't have WIFI at work, and get no signal at all.
I still have a week to return the phone but I'd like to keep it if I can get a better signal.
I am still within my 14 day, maybe 5 days left
Click to expand...
Click to collapse
Are you new to VZW or have all of your phones had the same problem?
With the thought of you possibly leaving VZW, you would think the store would have tried a new sim card, if only to pacify you. Or they might have offered to switch out the device.

jdk2 said:
Are you new to VZW or have all of your phones had the same problem?
With the thought of you possibly leaving VZW, you would think the store would have tried a new sim card, if only to pacify you. Or they might have offered to switch out the device.
Click to expand...
Click to collapse
I have been with Verizon for years. My Droid X didn't have the best signal but it was much better than this.
One problem is, the store is located in a 4G area, it works great there but it doesn't where I live, nor where I work (which is a decent sized city)

It sounds like you have a bad phone. I'd be pushing for a new one before your worry-free period is up.

Okay, I reset my phone this morning and surprisingly, the signal is much better.
I went from 80-100kbps to about 500-600 kbps. Does that even make sense? The phone is only a week old
Now, perhaps I'm getting too hopeful here and the wind is blowing the right way today or something.
Yesterday I checked my signal with 'Open Signal' (I'd love to know of a good tower location app), and my signal was about 20-23%, right now its at 32-37%. I know that isn't a great jump but in the scheme of things, it is. I'm also at -97dBm, I think yesterday and the day before was over 100
I will note however that I'm still at 2 bars of 3G
I think its just chance , but I'll keep an eye on it.

Couple of weeks ago I also contacted VZW about bad signal/slow data speeds with my phone. They also told me a SIM would be the first fix to try. I had them send me one, for free 2nd day.
Before I swapped it out.. I rebooted my phone and put it in a certain spot and observed signal strength. In my house it ranges from -109 to -113. The data speeds, when the test would even finish, were abysmal. Ran 3 tests and in general they were about 500Kb/s down and anywhere from 0 to 300Kb/s Up. And that was on LTE!
Now without wiping my phone or anything I installed the new SIM and called VZW to activate as their website was bombing. Finally got the thing activated then put my phone back in the same exact spot to observe any changes. While signal strength did not get any better my data speeds increased a whole lot! In the same spot I was getting 5 Mb/s Down and 3 Mb/s Up on average.
Ive also noticed a decrease in LTE drops to 3G and 1X like I was getting before.
So while Ill say that it would seem to be impossible for a SIM to make your signal better, it just may help with your connection.

Thanks for that, I'm going to go up there in awhile and at least swap the card

Well this is my side of the story I had the Galaxy Nexus before sometimes in New York I am in spots where I dont have 4G what is weaird when I go into someones house which i've been many times I only get 3G and then when I go outside I get LTE anyways at the same spot I get 1-2 3G bars and my friend gets 3 bars on iPhone 4S but when doing speed test on both it seems about the same.
Also I am running CM10 and when I was on stock I could tell the signal was a little bit better , you guys think it would be worth a try to swap out sim card as well? how do I make them give me a swap for free?