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A few weeks ago my evos data became ridiculously slow. I was the latest stable cm6 (6.1.2 iirc) and it was out of nowhere since I did not install any new apps or make any changes. I did a nandroid back to when I first rooted and I still had no 3g (wifi, bluetooth, wimax, 1x all work).
The tech I talked to at Sprint had me try updating everything and even a factory reset (which I already tried before calling). I have Best Buys phone insurance (never again. Sprints is much better after having to use both at one point or another) so I took it to best buy and when I get my phone home the data and phone are slow. After a few days I notice in ##debug# evdo engineering has <failed> on everything and I was running 3.26.xx.x I just ran the ruu to the latest 3.70 and it is snappy again but still no 3g.
Once I get time I am going to take it to the sprint repair center but I am curious if anyone else has had this problem. A search on here and Google doesn't come up with anything.
speedracerbubba said:
A few weeks ago my evos data became ridiculously slow. I was the latest stable cm6 (6.1.2 iirc) and it was out of nowhere since I did not install any new apps or make any changes. I did a nandroid back to when I first rooted and I still had no 3g (wifi, bluetooth, wimax, 1x all work).
The tech I talked to at Sprint had me try updating everything and even a factory reset (which I already tried before calling). I have Best Buys phone insurance (never again. Sprints is much better after having to use both at one point or another) so I took it to best buy and when I get my phone home the data and phone are slow. After a few days I notice in ##debug# evdo engineering has <failed> on everything and I was running 3.26.xx.x I just ran the ruu to the latest 3.70 and it is snappy again but still no 3g.
Once I get time I am going to take it to the sprint repair center but I am curious if anyone else has had this problem. A search on here and Google doesn't come up with anything.
Click to expand...
Click to collapse
Have you tried updating your profile? Also, are your radio/baseband, PRI, NV & WiMax files updated to the latest versions? You can check it by going to Menu-Settings-About Phone-Software Information. The NV will not be listed, by the way.
Yes, everything is the latest. I even tried the port and proxy reset to 0 and 0.0.0.0 respectively method with no change.
It seems like my radio just doesn't work on 3g anymore. I hope to get to the sprint service center before the weekend.
speedracerbubba said:
Yes, everything is the latest. I even tried the port and proxy reset to 0 and 0.0.0.0 respectively method with no change.
It seems like my radio just doesn't work on 3g anymore. I hope to get to the sprint service center before the weekend.
Click to expand...
Click to collapse
I hear ya. Hopefully, they'll provide you with a new EVO instead of a refurbished one.
Call sprint's advanced tech support.
877-809-6696 ats advanced tech supp
Ask them to do a full profile reset or update. They ask you to power the phone off for a few min (they even asked me to pull the battery, but I didn't see a need for that). Then when it reboots, it will do the ota provisioning, which should correct things.
gpz1100 said:
Call sprint's advanced tech support.
877-809-6696 ats advanced tech supp
Ask them to do a full profile reset or update. They ask you to power the phone off for a few min (they even asked me to pull the battery, but I didn't see a need for that). Then when it reboots, it will do the ota provisioning, which should correct things.
Click to expand...
Click to collapse
They did that as well. The tech said it was basically like a new line.
It is odd because every other thread I see online has had it fixed by one of the common methods or by calling sprint.
I have a tux fitting tomorrow for my brothers wedding and the sprint service center isn't too far from that so I should be able to get it checked out then.
It may be Sprint and their network. A lot of people have been stating that they are either getting really fast speeds or really slow speeds. If I understood everything correctly I think that Sprint is going through several updates for a while to be more competitive and provide better service. It may not be your phone. If you have any friends with the same phone then does a speed test to the same server side by side and see if that is different. If the results are the same it is the network, but if the other phone is faster then it is your phone that is having the problems.
Smurph82 said:
It may be Sprint and their network. A lot of people have been stating that they are either getting really fast speeds or really slow speeds. If I understood everything correctly I think that Sprint is going through several updates for a while to be more competitive and provide better service. It may not be your phone. If you have any friends with the same phone then does a speed test to the same server side by side and see if that is different. If the results are the same it is the network, but if the other phone is faster then it is your phone that is having the problems.
Click to expand...
Click to collapse
My friends evo is perfect right next to mine in san jose to sacramento. I have no 3g anywhere I have been lately (Monterey all the way to South Lake Tahoe).
I was having the Same Issue with my wife phone but she was running CM7 RC2. I was able only fix it by installing sprint Lover.
Then as itohead said try to install Sprint Lovers and see if that works. If not then I think that there is something wrong with your phone and you may need a new one, or wait till the Evo 3D comes out and get one of those.
I forgot to update this. Sorry guys.
Took it to a sprint repair center and the tech said he's never seen that before and ordered me a new one on the grounds that my usb port was "broken".
Sent from my PC36100 using Tapatalk
I'm rooted using Axiom 2.2 and every once in awhile my phone will go from 4g to no signal at all and i didnt move or anything or change networks. It just completely drops and then will come back after 20 seconds if i switch in and out of airplane mode or restart my phone. should i flash the leaked 4.0.3 radios. will that help at all? or any other suggestions?
If you're in the US and on Verizon it's a known issue, something to do with how they've set up LTE which I didn't bother bookmarking. There's several threads on it scattered about.
If not please supply more details of your setup.
yea im in the US on verizon but my friend has the nexus too and his doesnt do that were both hacked with the same exact set up. i know 4g is an issue but im in NYC and i should never be out of 4g and if i am i shouldn't lose 3g and data completely and no txts or calls while its out
tsew03 said:
yea im in the US on verizon but my friend has the nexus too and his doesnt do that were both hacked with the same exact set up. i know 4g is an issue but im in NYC and i should never be out of 4g and if i am i shouldn't lose 3g and data completely and no txts or calls while its out
Click to expand...
Click to collapse
Is this what it does?
http://www.youtube.com/watch?v=95CdIpxup5Q
My first Nexus did this. Tech support had me go to a store and have them swap out the SIM card...but within the first 5-10 minutes after I left the store, it did it again twice. I went back to the store, they swapped out the phone, and the new Nexus hasn't done it one time since (this was about a week ago).
If, on the other hand, your phone maintains at least a couple of bars of signal but just loses the 3G/4G icon for a while every so often, it could just be Verizon's 4G network acting up. This can cause intermittent data drops, even if you're in a 3G-only area. Give it a day or so, and it should clear up.
thanks kinda what it does where it just goes out and comes back but my speed has never been that slow i always have good download and upload speeds just lose connection every once in awhile. would flashing the 4.0.3 radios help at all?
It's not a faulty phone.. it is just LTE growing pains. Yes you can probably get them to give you a new device, but it isn't necessary.
Also, the newest radios might help.. and if they don't you can always switch back
yea i have 4.0.2 and 4.0.3 on my phone so if 4.0.3 doesnt work i can just flash 4.0.2 and then ill be fine?
tsew03 said:
yea i have 4.0.2 and 4.0.3 on my phone so if 4.0.3 doesnt work i can just flash 4.0.2 and then ill be fine?
Click to expand...
Click to collapse
In terms of radios and roms, yes you can flash a 4.0.3 rom/radio or a 4.0.2 rom/radio. The trick is just to find which radio works best for you as not every device is the same
Seems like its more of on the Verizon side not really a phone radio issue.
Only problem im having is dropped calls but not short calls seems to only happen at about the 15 min mark on all long phone calls.
I keep a steady data connection at all times
This JUST started yesterday...
So, yesterday at work I noticed I had no data...so I did the typical restart...still no data...I shrugged it off and went on my way. As I was driving I had data again. I use wifi at home, so when I got home I didnt notice any issues and honestly kinda forgot about it. Well on my way back to work this morning I looked at my phone...had full 4g service...all seemed well. Then I got to my office...
Now let me explain I DO have 4g in this area but honestly...its only a solid 4g outside. Its not the greatest indoors. Well in my office I only get 4g if I'm standing at the window or one "sweet" spot at my desk. So 99% of the time I'm in 3g. Well to make a long story short my 3g antenna seems to be borked. I can pull 4g fine...on lunch today I was in 4g and it was working great. However, when I'm in 3g I get zero data...my phone doesnt work in 3g only 4g.
I called verizon and they just decided to send me a new phone...
I have rooted my phone and I have put the newest radio on. That was awhile ago though. Tonight I'm going to try flashing a different radio but has anyone else had this problem?
Again I get NO 3g service only 4g. In an area where 4g is spotty thats NOT good.
Thanks!
Yes, I had the same issue. The first Nexus I had gave me spotty 4G service and never went to 3G in the couple of weeks I had it. Amazon sent me a replacement which is rock-solid. I get solid 4G coverage where I should (my wife and several coworkers have LTE phones so I know where I should) and when I don't have that 3G kicks right in.
I think you should definitely expected better results with a replacement. Good luck.
I had chosen to use 3G over 4G to save battery life. After about a week with the phone I began to notice that I can hardly ever get 3G reception any more, even though 4G reception has always been excellent. I don't think it is a problem with the phone, but rather Verizon tinkering with its network.
I was having the same problem all day today.
I switch the phone to CDMA during the day and use the office's WiFi for data. However, I noticed today as I dropped my daughter off at school after lunch that I had voice only and no data. Her school is the first tower north of my office that doesn't have an LTE radio, so I normally just get 3G.
Not today.
I drove back to the office and I was able to get data through the LTE radio, but the data connection would go dead as soon as I switched to CDMA. I thought there might be something wrong with the CDMA tower, but two of my co-workers had Thunderbolts set to CDMA only and they were having no problems getting data connections.
I talked with tech support for a good couple hours this afternoon and they had nothing for me. Eventually I flashed the leaked 4.0.3 radios and CDMA magically started working again.
Did the new radios fixed the problem, or is it just a coincidence?
Hmmm...
I have been having the same issue since yesterday. Verizon said there is no outages in the area. I had no data all the way home from CT to NY and finally when I got home at night 4G worked. 4G was working in and out on my way in so I forced CDMA to see if that worked and I have been unable to get anything since. I have a new SIM coming today, but somehow I do not think that will solve the issue.
I've noticed this too. I was turning my LTE off thinking it would use 3g, but I'm noticing now that many times I either have 4g or no data at all.
Sent from my Galaxy Nexus using Tapatalk
I'm having the exact same problems and registered here to see what the resolution is. I'm apprehensive to root as I am still within the 15 day return window and quite frankly for 300$ I think this is total BS. Never had a dropped call, missed or unsent text on the 3g network on my old Dinc and I've lived in the same place for 2 years.
OP- could you keep this updated on how your new device works out?
same exact thing happened to me. I'm already on my second nexus and I didn't want a refurb or to lose root. So I flash android revolution hd , used tb to delete all my apps, and hid all signs of root including deleting su. I took it to Verizon and they gave me a new sim card. It was OK for about a day then started acting up again. So I called them from my wife's phone and they had to reset my number to the network and its been fine since
Sent from my Galaxy Nexus using XDA App
justin94 said:
same exact thing happened to me. I'm already on my second nexus and I didn't want a refurb or to lose root. So I flash android revolution hd , used tb to delete all my apps, and hid all signs of root including deleting su. I took it to Verizon and they gave me a new sim card. It was OK for about a day then started acting up again. So I called them from my wife's phone and they had to reset my number to the network and its been fine since
Sent from my Galaxy Nexus using XDA App
Click to expand...
Click to collapse
What do you mean by reset your number to your network? Never heard that term before
I'm not exactly sure, some techs don't know about it. When I had my charge it had no data. So they reset my number and phone to the network and I immediately got data back
Sent from my Galaxy Nexus using XDA App
okay so i've had my verizon gnex for over a month now, and i have tried almost every set of radios on this thing and i cannot for the life of me get a reliable signal.
whenever i reset the phone, it comes up with good signal and 4G every time. but after a while of watching the signal icon, i notice that it stops downloading and will only try uploading. after about 10-20 seconds of that, it flat out drops all signal and goes to no bars with no data. now depending on what radio im trying, it will take between 1 and 10 minutes to regain signal and data again.
I've spend hours and hours searching the web for a fix for this... i've tried different roms, kernels, radios, setting my minimum CPU to 700mhz, etc and have not found a way to get this thing to hold signal 100% of the time. my girlfriend has the rezound and she gets very good signal everywhere we go, and so do i, until it randomly drops then regains it.
It seems like the signal falls asleep then has to reboot or something.
I've read that people with similar issues have exchanged their devices for another gnex through verizon and will get one that works great, while others say they've had 3 or 4 and all of them act the same.
I would exchange this in a heartbeat if i knew the next one i got actually worked, but if it didnt i would hate the fact that i was now stuck with a refurb when i did have a virgin device that worked just as good.
any help would be greatly appreciated.
Thanks in advance!!
P.S. Radios I've Tried:
4.0.1 EK02-LTE EK01-CDMA
4.0.2 EK02-LTE EK05-CDMA
4.0.3 EK04-LTE EK06-CDMA
4.0.4 FA02-LTE FA02-CDMA
4.0.4 FC05-LTE FC04-CDMA
Your running Verizon correct???
There are official 4.0.4 radios that I have been using and hand offs and signals are better and faster and more efficient on the battery because it uses the stronger 4G for larger task and would drop to a low 4G speed for energy saving and then shoot up when needed most.
Would you like the radio file???
---------- Post added at 08:24 AM ---------- Previous post was at 08:10 AM ----------
Also it's not the phone or your coverage. It's your sim card. Verizon have just started their sim card program and they admit that it is flawed and should improve as the years go by.
So your sim card is always looking for a 4g signal. But for some reason it is flawed. There I'd a comment about it (read em) that talks about it.
Official 4.0.4 radio?
Which radios do you have? I thought the FC04 / FC05 were the newest and supposed to be the official? If you have newer could you send them to me please.
DLD511 said:
Your running Verizon yes???
There are official 4.0.4 radios from that I have used and hand offs and signals are better and faster and more efficient on the battery because it uses the higher for larger task and would drop to a low 4g speed for energy saving and then shoot up when needed most.
Would you like the radio file???
---------- Post added at 08:24 AM ---------- Previous post was at 08:10 AM ----------
Also it's not the phone or your coverage. It's your sim card. Verizon have just started their sum card program and they admit that it is flawed and should improve as the years go by.
So your sin card is always looking for a 4g signal. But for some reason it is flawed. There I'd a comment about it (read em) that talks about it.
Click to expand...
Click to collapse
I would like the radios as well, if possible. I'm currently running 4.0.4 (I was under the impression it was the 'official' Verizon release) which is on I515.10 V.FC04/I515.FC05. Are your radios different? I've heard the 4.0.4 that was released in February has better radios than the one that was released recently, but I haven't checked it out myself.
http://androidcommunity.com/verizon-galaxy-nexus-4-0-4-radios-improve-3g4g-download-20120502/The ones I'm are i515.09 VFC04/ i515.FC05. I think they have different codings or something. Because the one im using gives me 32mbps on maxed 4g bars after I flashed the radios in the link. the one I would get stock from AOKP on Maxed 4G bars 23mbps.
So yeah the ones in the link are better for me. You just gotta do speed tests and experiment for a week or two. I'm satisfied with the radios in the link.
Here's the link:
http://androidcommunity.com/verizon-galaxy-nexus-4-0-4-radios-improve-3g4g-download-20120502/
Remember, they will exactly the same in about phone. They are just coded slightly different I guess of the official Verizon Radios. But I'm pretty sure Verizon will have the radios a little bit different once the OTA is finally released.
(It's a galaxy nexus with a Sense 4 theme. So ignore the sense status bar!)
Here's the picture of my average result.
Get a replacement phone. That type of drop shouldn't be happening.
No don't get a replacement. Had the same data dropping problems.
After I flashed the new radio files in the link, I stopped getting data drops.
It's just the Sim card that could be doing that if it continues after flashing the radios in the link I provided. So get a new sim card. Not the phone.
Sent from my Galaxy Nexus using XDA
xm0nkey said:
Get a replacement phone. That type of drop shouldn't be happening.
Click to expand...
Click to collapse
+1
I went through 4 GN's. The first 3 dropped signal to varying degrees. Radios or a new SIM card didn't fix it. The fourth was finally a keeper and *never* drops. Get a replacement.
I have a new gnex headed my way after going through the same rigamarole as the OP with the radios. The lady at the Verizon store wanted to switch my sim card, I said I wanted a new phone. She has one headed my way, but said to call for a new phone if that one didn't work and to complain to google for making bad software and not releasing the updates (as if google didn't want to push 4.0.4 down). I asked her, "So you're telling me I bought a $ 600 brick?" "Yep."
My phone would drop signal randomly for random periods of time throughout the day since the beginning. I loved my HTC Incredible 2, now I'm kinda sad I broke it.
My issue was signal DROP, not quality, which should not be happening and seems to be a hardware issue.
No. It's all Nexus phones are fine. It's just the radio files. And I haven't suffered any drops since I've flashed the radios.
Sent from my Galaxy Nexus using XDA
So i ended up sending it in (reluctantly) and got a new one mailed.
I've had my replacement for about a week now and not 1 dropped call, no data problems, nothing!!
I unlocked, rooted, and flashed AOKP M5, and ugraded to the latest official radios FC04 and FC05.
I am one damn happy customer with my VZW GNEX, its by far the greatest device that I've ever owned.
and as for the people looking for radios, feel free to directly download fully flashable zips of every Radio i own. these are not updates, but the full radio. so feel free to download to your SD card, and flash it in your custom recovery.
here are the links! (dont forget to hit the thanks button )
4.0.1 Radios EK02, EK01
4.0.2 Radios EK02, EK05
4.0.3 Radios EK04, EK06
4.0.4 Radios FA02, FA02 (old)
4.0.4 Radios FC05, FC04 (new)
Hello I have kind of just been lurking on this post and I suffer from the same problem. My first gnex was perfect I never knew anything about data drops until someone stole my original and I got a replacement. Now I'm finding myself flashing a new radio every week. I really hope these 4.0.4. Radios work.
Sent from my Galaxy Nexus using xda premium
Grandadd said:
Hello I have kind of just been lurking on this post and I suffer from the same problem. My first gnex was perfect I never knew anything about data drops until someone stole my original and I got a replacement. Now I'm finding myself flashing a new radio every week. I really hope these 4.0.4. Radios work.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
If your phone is like my original, the new radios will not help at all.
I recommend talking to verizon and demand that you have a new phone sent.
Verizon told me that they had no records of this phone having data drop issues, which is a complete load of bullcrap. Just make sure you tell them that you have tried multiple hard resets and that it doesnt do a thing. also, if they bring up the upcoming 4.0.4 update, tell them you just want a new device, as this update will not fix your problem.
Also, make sure to revert to complete stock before you send in your current one.
Good luck.
This was my biggest fear....leaving the iPhone on Sprint and coming to the Galaxy Nexus on Verizon and getting worse signal then Sprint (never thought that possible...lol).
However, I got the GNex on VZW and the signal was 'decent' for Cocoa Beach....but when I rooted and upgraded to 4.04 with the new radios that came along with it, my signal get a lot better. Not had one dropped call or signal since purchase.
Even got decent 4G in Orlando....and 4G is coming to Cocoa this year
I'm on my 4th replacement...not getting 20 drops a day but around 5...should I still exchange?
Sent from my Galaxy Nexus using Tapatalk 2
subsoniic said:
I'm on my 4th replacement...not getting 20 drops a day but around 5...should I still exchange?
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
i would see what kind of signal other verizon phones are getting in your area. if you both have equally bad signal, i would say its probably just your area. but if you have 1 bar when they have 5, i would get another one.
something to consider is switching to a different phone. i believe (someone correct me if im wrong), that you can switch to a different handset after receiving 3 faulty devices.
subsoniic said:
I'm on my 4th replacement...not getting 20 drops a day but around 5...should I still exchange?
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
I would exchange it still. I got my new phone and it is the way it should be. Went back to AOKP b37 w/ 4.0.4 radios and I couldn't ask for a better phone. No amount of flashing will correct the phone. I told the clerk I had factory reset with the same issues, I think that was what got me the new phone.
DLD511 said:
No don't get a replacement. Had the same data dropping problems.
After I flashed the new radio files in the link, I stopped getting data drops.
It's just the Sim card that could be doing that if it continues after flashing the radios in the link I provided. So get a new sim card. Not the phone.
Sent from my Galaxy Nexus using XDA
Click to expand...
Click to collapse
Sorry but this is wrong.
My first phone had a faulty radio/antenna. A hardware defect. The replacements I've gotten since have all worked fine on 4G. Same location, same SIM card. Unfortunately the screens are all terrible compared to my first one.
I have tried the new radios on my first phone and it didn't fix a damn thing. Changing SIM cards won't do anything, although Verizon might make you go through that step.
If someone is having the exact problem described in the OP, they need to get a replacement.
xm0nkey said:
Sorry but this is wrong.
My first phone had a faulty radio/antenna. A hardware defect. The replacements I've gotten since have all worked fine on 4G. Same location, same SIM card. Unfortunately the screens are all terrible compared to my first one.
I have tried the new radios on my first phone and it didn't fix a damn thing. Changing SIM cards won't do anything, although Verizon might make you go through that step.
If someone is having the exact problem described in the OP, they need to get a replacement.
Click to expand...
Click to collapse
I had the exact same problem as the OP and all I did was a complete wipe from my recovery (including dalvik) and flashed the newest CM9 Nightly (06/03/2012). I haven't had a dropped signal since that, and it's been over 12 hours now and I've been on my phone almost non-stop.
Please try a full wipe and re-flash before you get a Verizon Refurbished phone. It worked in my case and it has to work in others.
Verizon Wireless GNex here...
Zero signal issues in Brevard County, Florida.
Brilliant 4G in Orlando as well
Hey guys, I just a sprint gnex phone a few weeks back and ran the GNex toolkit v9.1 to unlock and root it this past saturday so I could use a hotspot app for my tablet.
I don't know if this is just a bad coincidence or if I did something wrong..I'm not new to roms and have modded my previous phone (evo 4g) about 50 times, but here's what's happening.
Prior to this weekend I had full signal/bars..Now I can barely get 2..It's mostly sitting at 1 bar and sometimes drops the connection entirely. At the same time, every txt msg I send comes back with an error stating it did not send, however...It does actually go through, twice even. This happens with every text to every person.
I didn't put a rom on it, and I didn't even install clockwork mod...I simply just unlocked the bootloader and rooted it. I did setup google voice afterwards. I can't see how doing this would cause these kind of issues and I haven't called Sprint yet as I absolutely despise their customer service..I'd rather get feedback here first.
The coincidence that I'm referring to is that I'm in Austin, Tx and they're in the process of spinning up 4g LTE towers right now..If by chance they started upgrading my tower this weekend (yesterday & today) then I could definitely see these issues...I walked down about 2 blocks where I do get a full 4g signal, but my txting still had the same issue.
Any ideas or thoughts about my problems?
On one hand, I would tell you that rooting doesn't cause that.
On the other hand, you used a toolkit, so who knows what you ended up doing.
If you haven't changed anything as far as ROMs or mods, then I would suspect you're right about something with the network. The only other thing I can think of would be hardware problems of some kind. That seems a lot less likely though. Sprint does supposedly keep a list of networks that are being worked on. You could check in with them and see if the one in your area is being upgraded.
Sent from my Galaxy Nexus using xda premium
Pierceye said:
If you haven't changed anything as far as ROMs or mods, then I would suspect you're right about something with the network. The only other thing I can think of would be hardware problems of some kind. That seems a lot less likely though. Sprint does supposedly keep a list of networks that are being worked on. You could check in with them and see if the one in your area is being upgraded.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
I do know they are upgrading the towers in my zip code to LTE 4G..I'll give em' a call tomorrow and see what they say.
This was the toolkit that I used.
http://forum.xda-developers.com/showthread.php?t=1995688
happened to me.
Reboot your phone and go to about and sprint system update.
update profile.
Idk why but its sometimes happens for no reason.
Make sure you have good connection first.(go outside)
If that doesnt work update prl to make the network find the closet tower to you.
robogoflow said:
happened to me.
Reboot your phone and go to about and sprint system update.
update profile.
Idk why but its sometimes happens for no reason.
Make sure you have good connection first.(go outside)
If that doesnt work update prl to make the network find the closet tower to you.
Click to expand...
Click to collapse
I was trying that repeatedly hoping it would fix it..but it doesn't.
On another note, today when I woke up and rebooted the phone I had full bars on 4G signal..Thought life was good and then about 5 mins later it was back to 1 bar 3G. That's the first time I've seen a 4G signal here in my apartment so I'm hoping it really is just the towers in my neighborhood being converted to 4G right now.
I've rebooted my phone 3 times now and the same occurrence happens..Full signal with 4G for a few mins, and then it drops to 1 bar 3G..Have updated my profile and PRL and tried airplane mode..Only way to get that 4G signal back is to reboot the phone..Won't stay on 4G though.