yashsingh1/xdaforums huggingface dataset:
[HTC Rezound] tcpsyn:
Happened to me today. Was just flicking around on the phone and it bounced, started bootlooping. I have the radio set to CDMA (PRL) only... checked after the battery pull... still cdma.

Sure would be swell to buy an android device that just works 100%, 100% of the time....
[HTC Rezound] AtLemacks:
No, only would happen when I put the cover back on the phone.
[HTC Rezound] jayochs:
sure would be swell to buy any phone that works 100% of the time, seeing as the newest batches of iphones won't activate for anyone because the new OS update apple put out completely breaks it's radio apparently lol.
[HTC Rezound] Piercing Heavens:
Just curious "LTE mode (w/voice)" would this force 4g? My phone is constantly on 3g in a 4g area. I know I have 4g available because putting the phone into airplane mode and out of it results in 4g data.
[HTC Rezound] buckwheat.phd:
This is just 100% sloppy code. Whomever was in charge of bootstrap code, and nobody checked his work. Just awful QA.

Here's what I've found makes it happen (simultaneously):

1) Sleep mode turns off radios, and puts it into WCDMA

2) WiFi is off

3) Verizon must be having their usual LTE problems, where your phone only syncs on 3G or a multi CDMA (around here, that's daily now)

4) You must reboot during all of the above to trigger the problem

When the phone boots, it goes through a series of "rc's" or bootstrap programs. Sort of like Windows autoexecs. One of the startup programs on the phone compares a few things like time (phone MUST receive updated time from Verizon), signal type, signal quality, carrier name, AND sim card matches to all the above. This is for any number or reasons, like to make sure it's in the correct market country, carrier etc.

Typically if none of the above worked it should just start another little alert program, telling you to switch modes, no signal or whatever. But the HTC solution I suppose is to reboot the phone. In our case, endlessly.

Some are saying out here that after the user does this 5-6 times it finally comes up and works. Well what's probably happening are 2 things - #1) Verizon is bringing either 3G or LTE back online and 2) Your phone re-reads it's simcard/phone parameter pairings to ensure they match. During all the hubbub and time to do this 5x times, Verizon usually has one of the other back online. Which on THAT reboot finally matches what your simcard says and it boots.

So in other words, if you get caught in this mode, with this phone, without a stable Verizon cell signal, you may be screwed until Ver can get their network back up. As mentioned earlier in this and other threads, VZW has had an awful time lately.

THIS HAS NOTHING TO DO WITH ROOTING/UNLOCKING YOUR PHONE, SO DON'T FEEL GUILTY. It's just boot/compatibility code that can't deal with this scenario.

To me this is a pretty serious problem. Most of us that read this forum are competent enough with these little Linux micro kernels can fix this with enough patience (and good timing with Verizon system restarts). But what of the other 1.2 mil customers who own this phone?

Here we go again. We've got the best phone, with yet another debilitating bug, and hopefully we won't be in the middle of VZW and HTC pointing the finger at each other. With as much resources lately that Ver has had to divert to just keeping it's network going, I would seriously doubt they can police HTC into forcing them to fix it this "little problem". So - it may be a while
[HTC Rezound] jayochs:
buckwheat, thanks for the in depth explanation! totally makes sense. i agree, everyone is probably returning phones for this issue, which sucks, because it's just an inherent problem on all rezounds. therefore, verizons gonna factory reset them, then send out refurbs, and it'll happen all over again. let's bring this issue to HTC through the problem tickets filed online! i've still got an open ticket, so i'll bring it up.

also, anyone else notice this thread made the front page of XDA like a few days back? haha awesome :cool:
[HTC Rezound] zeus_r6:
This thread was a lifesaver...or a timesaver at least. Mine went into bootloop this morning and I just happened to remember seeing this thread. Another thing it's been doing for a couple weeks is only seeing 1x or 4g data. I'm showing 3g for now after the bootloop fix, but I'm sure it's only a matter of time before "America's best network" does something to cause more issues with the phone.
[HTC Rezound] couchmonkey:
seriously, this happened to me for no reason at all over the holiday. I didn't know what was going on but remembered seeing this thread stickied. Lo and behold it helped. Saved me a lot of aggravation.
[HTC Rezound] jayochs:
woo, i'm glad we're helping people out with it :D

believe me, i pretty much had a heart attack when my phone started bootlooping..this thread started out as a cry for help lol but thankfully with some research i was able to find the issue!
[HTC Rezound] jg27:
point at which the loop occurs?

At what point do people see the bootlooping occur? On my Rezound the home screen is coming up for about 2-3 seconds before it goes back to rebooting. This doesn't give much time for trying any of the suggested fixes.

I've tried with/without sim, memory, and back in each possible combination.
[HTC Rezound] jayochs:
that's when it happens, once hte homescreen starts loading...but if yours is still bootlooping with the back off, you have a different problem, i'm afraid :(
[HTC Rezound] fjl307:
Has Verizon really not fixed this yet? Ridiculous.

I travelled to Mexico with my Rezound for three weeks. When I arrived back in the US, I turned my phone back on only to get this issue. Unfortunately I was in a bit of a travel emergency and really needed access to a phone.

Thanks Verizon.
[HTC Rezound] dm5530:
Would this be something one of the devs might be able to tackle now that we have an unlocked bootloader?

I realize it's not something the community should HAVE to fix but that seems to be the quicker way to get a fix for ourselves.

Anyway, awesome explanation. Much appreciated.
[HTC Rezound] pwned3:
Hmm I live right next to a tower and still have signal with the back off

sent from my newly unlocked Rezound
[HTC Rezound] jayochs:
right next to a tower? damn, you prob have cancer or something :p lol
[HTC Rezound] pwned3:
Lol. My signal with no battery cover is still -105

sent from my newly unlocked Rezound
[HTC Rezound] pwned3:
Just glad I have needed to do this. I would have to drive somewhere else

sent from my newly unlocked Rezound
[HTC Rezound] jayochs:
damn dude, wtf. hahahah that tower must be pretty strong!
[HTC Rezound] majorhunadadun:
Yeah I figured this one out on my own. Battery pull, remove sim, reboot, LTE switch (it's on wcdma pref), switch to CDMA auto, power down, add sim card, reboot, voila! This problem only happens to me when I fully discharge batteries and switch them out. Great to have a fix! Thx man! You're all over these forums! Haha!
[HTC Rezound] esheesle:
So do other people have this happen more than just once? Any ideas how to avoid the problem recurring? Easy fix, but annoying. I emailed HTC and they were trying to get me to factory reset even though I described the problem and told them it was fixed (and how i did so). I responded saying I wanted it noted for an update in the future. Maybe others should do the same if you haven't already.
[HTC Rezound] pixelsquish:
this is really annoying. easy fix but still.

this has happened to me 3-4 times in the last month.

i know for sure it happened before a factory reset running stock. after a factory reset stock. and then after rooting and bloat freeze (which was also a factory reset)

one time i went to sleep and i woke up with my phone dead, no alarm went off. i know i went to sleep with more than 50% of battery left. screen was off. it went into boot loop and died. luckily it was a weekend, no work.
[HTC Rezound] jayochs:
was the phone plugged in over night?

i have no idea why anyone who relies on a phone as an alarm clock WON'T CHARGE IT over night. it's not BAD for the battery, it doesn't trickle charge!!
[HTC Rezound] pixelsquish:
i usually charge it while i sleep but i purposely tested out my phone overnight a bunch of times atarting at 99-100% full - to see how much juice drained with the settings i use. never more than 10-15% depending how long i sleep. often less.

i should be able to rely on a $700 device to be an alarm clock FYI if i don't have stuff going on it that keeps it awake downloading all night.
[HTC Rezound] jayochs:
you should be able to rely on any $700 device as an alarm clock, but guess what? that's not how technology works. there's always going to be a problem or some sort of bug on ANY piece of tech no matter what, so you can't justify it like that. clearly something killed your phone that night while you were sleeping, and when these batteries seem to discharge fully, that's sometimes the culprit for why it switches to WCDMA from LTE/CDMA. testing it on a weekend like you did was smart, but i wouldn't ever risk that during the week lol
[HTC Rezound] pixelsquish:
its a bug that shouldn't exist. but i did test it on weekdays since 100% full battery should be fine for an overnight sleep. days i knew my gf was waking up for work when i needed to. her iPhone never failed :D

and i am an android fan.

i don't own an alarm clock :) been using my smarphone as an alarm clock for the last 3 years without a problem - from my work blackberry to my original nexus and then droidx. this is probably the first time i ever had an issue besides me not setting it correctly lol
[HTC Rezound] jayochs:
yeah, i don't have a clock either anymore....i'm always like "what happens if i don't wake up?!"

then i realize, 'meh, i don't like my job THAT much anyway....'

hahah
[HTC Rezound] esheesle:
So are the only people experiencing the bootloop setting their phones to 3g? I've had it happen 3 times but I also keep my phone set to 3g at all times for battery sake. I don't really need the high speeds often and can switch 4g on when I do. Wondering if before a shutdown/reboot I switch to 4g if that will prevent it.

So if anyone has been keeping 4g enabled and had this happen I'd be interested.
[HTC Rezound] Easton999GS:
thank you!

thank you so much for this fix i really appreciate it ! it saved me from having to factory reset my phone many times
[HTC Rezound] phxslayer:
Fix my reboot issues too. I was only experiencing the reboo9ts at home where I am on the edge of 4G access. I could see it switching back and forth all the time. I just run 4G when needed which is hardly ever since I browse most of the time via wifi. Working perfectly after LTE Switch to 3G.
[HTC Rezound] pantrybear:
I have had the boot loop problem and also always have 4G turned off.
[HTC Rezound] esheesle:
Seems to me that only the users running in 3g only mode have the issue then. I think I'll try to switch to 4g mode before and reboot/shutdown. Suspect that might alleviate the recurrence.
[HTC Rezound] Trooper Thorn:
Just got this for the first time, 3G only. I was doing a bump charge, removed the battery and put it back in to get a few more moments of juice (it turned green really quickly thereafter, probably not even necessary) and when I turned the phone back on it started bootlooping.

I don't have 4G in my area, so I have it set to 3G only because I don't want it to waste battery searching for 4G signal it will never find. Does anybody have any experience with battery life leaving 4G on in an area without it?

BTW, these instructions worked perfectly, though I did have to take the SIM out to be able to *#*#4636#*#*. It continued bootlooping even with the back cover off until I removed the SIM.

Frustrating. Makes me want to take it back for a new one. But I bought it at Best Buy, so I know they won't be easy about it.
[HTC Rezound] esheesle:
Taking it back may not change anything anyway as from what I'm seeing it may not be phone specific but rather setting it to 3g specific. It would be good to submit a trouble ticket to HTC detailing that you force 3g mode and it causes this occassionally though. If enough of us do maybe an update will fix it.
[HTC Rezound] OLDsJUNKIE:
I've had this happen when set to 3G only as well. I also have to usually pull the SIM to implement the fix. I've found that if I don't use reboot but power down and power back up manually to reboot it doesn't do it.
[HTC Rezound] 3oclockslop:
are you sure of the symbols?

This did work for me, but when I tried the sequence you have here, it did NOT work. I stumbled on a very similar post on Droid forums, but his sequence was #*#*4636#*#* using that opened up the screen I needed, and saved my ass. Thought I'd mention it, and thanks!
[HTC Rezound] 3oclockslop:
wrong again

I checked back on my info.... It was in fact. *#*#4636#*#* Sorry for my brain cramp and any possible confusion!
[HTC Rezound] random155:
Lots of numbers to get straight, make sure you double check to make sure you enter them properly.
[HTC Rezound] replica9000:
I haven't had a bootloop since I disabled eHRPD, so that might have been the cause for me.
[HTC Rezound] cobalt8:
Thank you for posting this! I took my phone to the store after it started bootlooping, but they were unable to fix it. Then I remembered seeing this post. I followed the instructions and voila! This kept me from having to get a replacement phone or resetting, which saved me the pain of setting everything back up again. I took the instructions by the store today in case they have someone come in with the problem. :)
[HTC Rezound] jayochs:
i finally got yet another bootloop problem...first time since i posted this thread.

i'm set to CDMA Auto, so no 4g, and i was just taking a few pictures...shut the screen off, put it in my pocket, when i took it out, saw the white HTC screen and it was bootlooping...weird.
[HTC Rezound] pkopalek:
***I want to start by pointing out that the new OTA (I think) is set to address this with some new system software and a new Radio. This is possibly a non-issue in the future*** http://xdaforums.com/showthread.php?t=1465654

I've also DEFINITELY had this happen when on CDMA Auto. (Or in Settings > Wireless etc > Mobile Networks > CDMA Only). I don't turn on 4g much, but this serious PROBLEM with this phone (as novice users will never be able to fix it on their own) has happened to me 8-10 times since getting this phone (a month and a half ago). Awful.

I figured it was an issue with the stock ROM. Every time this has happened, I've done a factory/data reset or restored a Nandroid Backup.

Knowing the fix in the OP is fantastic. I knew it was network related (as I also took off the back cover and that fixed the problem). I did it inadvertently trying to experiment taking out the SD Card (didn't fix anything).

I just never found a solution. Thanks, OP!
[HTC Rezound] bwthor20:
This happened to me last night. I have the latest OTA too, so apparently it isn't fixed. Had mine set to 3G only since there is no 4g in my area, and was in a small town bar with no signal inside. Felt my phone getting hot in my pocket and there it was, boot looping.

Battery was about dead, so I just pulled it. Got home and plugged it in and powered it up. Hour later, it was REALLY hot and boot looping. Hope it isn't damaged. Did a search and found this post. Problem fixed.

Any way to see from any logs or something to see just how hot it got?
[HTC Rezound] voxigenboy:
Apparently, I am screwed. I pulled the back cover and removed the sim. it still won't boot up... Just keeps looping.

Another trip to Verizon. Wee!

Luckily I haven't rooted it yet.
[HTC Rezound] jayochs:
damn. i rooted it after seeing the OTA didn't fix it lol, idc anymore
[HTC Rezound] denpad2010:
this ius something happened to me in two phone ive had two rezounds....i wish i had see this thread before hehehehe now i know what to do next time
[HTC Rezound] esheesle:
So most seem to indicate this is only happening during shutdown or reboot. Is it hitting people while the phone is actually on? I've only had it with reboot so far.
[HTC Rezound] pkopalek:
This is fully accurate, in my experience (happened to me mb 10 times at this point)

It happens on the stock HTC ROM, as well as all ROMs based on it (happens to me on Ineffablis)
[HTC Rezound] bigsnack:
Thank you. Now a bit related, but how can we adjust the slot cycle index(allows your phone to ring earlier vs the default)?
[HTC Rezound] voxigenboy:
when it happened to me, i just turned off the screen and went to bed. woke up to it doing the infinite reboot. btw it was already set to cdma evdo lte(auto) before it happened.

in store rep couldnt even fix it and issued a replacement. using that now & have fingers crossed.
[HTC Rezound] jayochs:
damn. this problem is really pissing me off..not that it's happening to me often (only twice so far) but that it's killing everyone elses phone to the point where they have to get replacements. this really sucks. i rooted my phone and am hoping maybe some of these roms will fix the error, but from what i saw, it happened on ineff rom to someone, so that blows
[HTC Rezound] voxigenboy:
its still Verizon's best phone. and this time i do not plan to "switch" until HTC releases some killer quad-core.
[HTC Rezound] esheesle:
So pulling the back cover didn't stop it? Sounds like maybe it is a different bootloop issue
[HTC Rezound] jayochs:
i agree 100%. i love this phone and i love selling it lol
[HTC Rezound] replica9000:
That could be soon: HTC Edge
[HTC Rezound] bigsnack:
We still barely have apps taking advantage of dual core cpus(same goes for iOS); hell, even Android OS barely utilizes the dual core cpu, so I can't really imaging quad core at this point in time being that much faster. But, this is all a topic for another thread really.
[HTC Rezound] voxigenboy:
yeah they'd been talking about that edge forever. even asus has been talking about their quad padafone & a possible early 1st q 12 release. i doubt we'll see any quads until late spring/early summer.
[HTC Rezound] replica9000:
True, even for desktops still. As long as the kernel supports SMP, it can divide proccesses among the cores, potentially giving us better performance. I think most of us aren't doing anything that needs more than 2 cores right now.

Edit: To keep this on-topic, since I've disabled eHRPD, I haven't had a single bootloop.
[HTC Rezound] pkopalek:
I haven't had ehrpd on in months, and I've definitely had the boot loop happen this way too.

I hope you don't.

I flashed the new radio and kernel. I hope that helps!
[HTC Rezound] merlin66676:
How do you disable eHRPD? I live in an area that doesn't have 4G. I have had 2 bootloops in the past 2 weeks and didn't find this thread til today :(. 2 factory resets. Have a replacement coming tomorrow and might just send it back if this is the issue.
[HTC Rezound] replica9000:
http://xdaforums.com/showpost.php?p=21403943&postcount=457
[HTC Rezound] esheesle:
Ota but just had wcdma bootloop. Time to file complaint with htc
[HTC Rezound] pilot85:
This thread just took a lot of frustration away. Thanks everyone that come up with this fix.
[HTC Rezound] esheesle:
Emailed htc again. They arent acknowledging the issue. Said i should factory reset and could be an installed app. I just requested a future ota to fix it but they seem to think it is isolated. Suggest everyone submit a report to htc or we'll never get a fix.
[HTC Rezound] oct2274:
Steps that will work everytime - atleast for me :)

1. Disable WiFi - you can do this while it's bootlooping, you just need to be fast and get to the settings before it boots again. Once you verify that Wifi is off after next boot, you can go to next step. Keep WiFi disabled till phone stops boot looping and is working correctly

2. take off back cover and remove battery

3. insert battery and boot phone with back off - must have back off!

4. with back off still, go to settings, then go to Wireless & networks, then go to Mobile networks, then go to Network mode, select LTE/CDMA. Go back to main menu. Go back and verify LTE/CDMA setting is still selected. I've had mine go back to CDMA only before. If you still show you are set to LTE/CDMA, then you can put the back of the phone back on. After you put the phone back on, it will reboot again, but this time when it comes back up your phone will start working!
[HTC Rezound] replica9000:
The few bootloops I had, I couldn't get to the home screen on my Rezound. A battery pull was necessary, and fixed the problem. Since you can get to the home screen, one thing you could try, if you're rooted, it to try an app called Quick Boot. When you're stuck in a loop quickly open Quick Boot and select reboot. This helped me out on my DInc when it would bootloop. Using this app would break the loop without disabling anything or removing the battery. The loop on my DInc was caused by a different issue than on my Rezound, but it may work for you. Just keep the app shortcut on the home screen somewhere for quick access.
[HTC Rezound] Sax1031:
thanks guys

2nd time I have had this happen. 1st time I pulled the sim out and did a factory reset.

this time I changed the mode back to CDMA + LTE/EVDO.
[HTC Rezound] dalvear88:
i'm getting something similar to this, but i'm getting it when i try to flash an ics rom. Every single one that i try seems to do the same thing to me, boots up like normal, but then has no signal, and gets stuck on an activation screen with a ring going around and around over and over, then it just happens to shut down and keeps doing that over and over, havent tried this, but about to, hope this works.......
[HTC Rezound] dalvear88:
Yeah so this fix didnt end up working for this particular issue i'm having, not sure at all what would be directly related to this, but i'll keep searching. If anyone has any ideas, it would be much appreciated.
[HTC Rezound] joblabbo:
Woke up today to see the phone bootlooping so I mailed it out for the HTC warranty repair. Lets hope they don't complain about the relocked bootloader..

Sometimes after a bootloop I would have widgets unable to load and also had the double screen glitch after doing an unlock http://youtu.be/n7YX-PrJkVQ it was infrequent but concerning.

and there were the gralloc_unlock warnings going crazy in the logcat logs. I was able to find a msm8660 file that disabled the error output but did not change anything.

W/msm8660.gralloc(27909): gralloc_unlock hnd->base 0x477c7000, hnd->offset 0x0

My guess is its either the gpu or mainboard/nand.
[HTC Rezound] CyberZion:
I have not had this problem sense I turned back on the LTE.
[HTC Rezound] Sax1031:
I wonder if it is a problem with the CDMA only setting.

I generally stick to that for data.

Just had my 3rd boot loop happen today.
[HTC Rezound] k1ng r4t:
So what do you do if your phone doesn't stay usable long enough to dial this number or download an app from the market? I'm terrified of restarting my phone now, living in fear that I'll have to a FDR and enter in all my information for the umpteenth time and debate if I want to restore from TiBu or just start fresh.

Soooo frustrating, especially just coming from a Bionic, as this was offered as a replacement. Btw I'm on the OTA, unlocked, and rooted with AmonRa. Please help, I really don't want to go through the hassle of locking/unrooting this thing to send it in for ANOTHER replacement phone...
[HTC Rezound] Sax1031:
as far as I know the problem is the phone searching for the wrong network.

pulling the sim should buy you as much time as your battery would allow. you just have to change the network mode and put the sim back in to have service again.