yashsingh1/xdaforums huggingface dataset:
[EVO 4G Q&A, Help & Troubleshooting] TeamGold:
This.

I was having the same problem htcevo4g03 was having and I had hboot 0.76.2000. Here is what I did:

Made a nandroid backup

Using rom manager I downgraded to clockworkmod 2.5.0.7

Downloaded hboot 2.10.0001 under Evo Stock and Radios

Wiped data and cache (I don't know is this is necessary but probably not a bad idea)

Flashed hboot 2.10.0001

Downloaded and flashed fresh evo 4.2 (a rom that wouldn't flash before) via recovery and it worked!
[EVO 4G Q&A, Help & Troubleshooting] Sheetzie03:
Hey Man,

I haven't tried anything yet but im going to this morning.

Looking at the bootloader screen, says:

Supersonic EVT2-3 SHIP S-OFF

HBOOT-2.10.001

MICROP-041f

RADIO-2.15.00.05.02

Ok so I should download anything prior to 2.16 and flash like a rom?

Thoughts after youve seen my version?
[EVO 4G Q&A, Help & Troubleshooting] Sheetzie03:
looks like the hboot version youve downgraded too is the one Iv had :(
[EVO 4G Q&A, Help & Troubleshooting] Sheetzie03:
I downloaded and flashed Hboot 2.02 from the evo stock and radios and then tried to flashed Virus and Synergy, but the same thing is happening.

Im going to try hboot 2.15 but it sure dont look good. This is UNREAL
[EVO 4G Q&A, Help & Troubleshooting] Sheetzie03:
Bump:

Anyone of you guys that replied earlier in the thread or Anyone else out there?

Any help would be very much appreciated!
[EVO 4G Q&A, Help & Troubleshooting] tnEVo:
Might sound weird, but have you tried reformatting the SD card?
[EVO 4G Q&A, Help & Troubleshooting] Sheetzie03:
hey the reply is much appreciated!

If you read my op, I mentioned someone told me to dl sd formatter on my pc which I went through the steps and it didnt work.

Hey man If you get a chance please read my op, this is prob going on a month and a half and no fix to this point. I would have though if I brought the issue here, it would be resolved like that but it hasnt. Iv tried everything ppl have thrown at me and not a thing has worked. Other than froyo roms and 2 gb roms(cm7/miui), cannot getting anything to work. Ill flash a rom, it always says successful I reboot, turns to the white screen and gets stuck, rebooting over and ove, always back to the white screen and Im forced with a battery pull to do anything else. AMAZING!

If you can just look over the OP maybe just maybe you might have something you think could work.

The very last thing i tried, in which 2 ppl said they were having the same issue, was to downgrade the Hboot. I did this and it didnt work. SO frustrating.

The one thing I did not try that was said to do was unroot, go back to stock, and root again.

SO lost here. Again thanks for contributing to this thread.
[EVO 4G Q&A, Help & Troubleshooting] dased14:


I would just go ahead a unroot,wipe the hell out of it then go a reroot the see what you get. With everything you have tried so far that maybe the thing you need,sorry I couldn't be more help.
[EVO 4G Q&A, Help & Troubleshooting] oreoferret:
Same situation here now

So.. i'm in basically the same situation.. with a wrinkle.

I just tried.. about 8 roms.. ALL of them get stuck on the white screen

Except.. CM 7.0.3.1.. that seems to install

Any thoughts on what the heck that could be?

Roms I tried:

miui

warm 2.2

calkins new one

kings 3d

fresh 4.2
[EVO 4G Q&A, Help & Troubleshooting] HipKat:
I agree... unroot, run the s-on tool form unrevoked.

run the RUU for your phone

re-root

flash Amon Ra recovery and try a new ROM
[EVO 4G Q&A, Help & Troubleshooting] Sheetzie03:
Hey hip,

OK if I have to start from scratch I will. But since I'm a super noob, can you please be a little more specific on the steps I have to take? I don't know much about s-off and s-on tool and also what ruu is. If you can just point me in the right direction then I can follow the directions.

And ty for your time
[EVO 4G Q&A, Help & Troubleshooting] HipKat:
Read and learn, Padowan

https://spreadsheets.google.com/spr...U2Mi1hNWU0LTRlNjEtYWMyOC1lZmU4ODg1ODc1ODI&ifq
[EVO 4G Q&A, Help & Troubleshooting] Sheetzie03:
Hey hip,

Thanks very very much. Looks like that tutorial will help a lot. If I happen to have any questions I will shoot you a pm if that is OK.

Iv started to download the things needed and will be beginning this very soon.

So the steps are, do the ruu, run the s-on tool(at this time I will be unrooted?), and then reroot using the easiest method which is still unrevoked correct?
[EVO 4G Q&A, Help & Troubleshooting] HipKat:
Close, run the S-On tool first in recovery, then RUU, that will get you back to stock. Then Re-Root, flash Amon Ra Recovery, flash your ROM.
[EVO 4G Q&A, Help & Troubleshooting] Sheetzie03:
ok im = finished with s-on and ruu. I followed the direction exactly as it said too.

SO yes im back to stock now but one thing I noticed im still S-off, is this correct or does this mean i may have done something wrong?

I did not notice any thing that went wrong during the first part but the second part,-Reboot bootloader, flash ruu part it started the update and after it went through the progression of updating each one it showed this:

Parsing....(sd zip)

Boot-fail pu

recovery-ok

system-ok

userdata-ok

splash1-ok

wimax-ok

Partition update failed(in black)

Update failed(in red)

and a side note, i did try installing a root only app and it wouldnt let me. so I just dont know.

i am stock but still says s-off. Not sure where to go from here??
[EVO 4G Q&A, Help & Troubleshooting] Serial70:
I feel like I have seen this before. Does your evo get incredibly hot during the flash? Specifically close to the soft buttons at the bottom of the screen? My first one had an issue where it was built with what I can only guess was a faulty batch of capacitors in the power management section of the phone's hardware internals. When it would use too much power, for example, flashing a rom, or even leaving the screen on for extended amounts of time, it would reset, then due to the temperature generated during boot, it would continuously do exactly what you are describing. Even your list of working ROMs is about the same as mine was. I brought it back to the stock ROM by flashing and putting it into the freezer until it came up successfully, then had the Sprint service center check it out. They had no clue what was wrong, so they blamed me for it. Since I didnt have insurance, I bought a new evo and took my old one apart. I am a 10 year electronics technician for the US Army, so I know what I am doing as far as troubleshooting hardware issues, and I found 3 blown capacitors. Just thought I would share my experiences, hopefully this helps. My suggestion would be to purchace insurance (if you dont already have it), flash it to stock, un-root and remove S-off, wipe everything (read: EVERYTHING to include log files etc.) and make an insurance claim. You will get a refurbished evo as a replacement, but since this is a hardware issue that HTC and Sprint arent acknowledging, refurbished is a lot better and cheaper than the $400 i had to spend on a new one...
[EVO 4G Q&A, Help & Troubleshooting] Sheetzie03:
SOrry I was in the middle of editing my last post. read it now. I followed the steps hip said to do but still s-off. Lost my man
[EVO 4G Q&A, Help & Troubleshooting] Serial70:
If you used the unrevoked s-on tool, it needs to be run several times to actually take. It will say that it was successful, but the only way to know for sure is the text at the top of the boot loader. If you only ran it once and it said success, then you flashed the latest RUU, you have quite the issue on your hands. HTC has locked the recovery mode with the latest RUU, so until someone finds a way around it, you are stuck with the stock ROM and S-off. If you search through the Android Development section of this forum, there is more info about this than I have offhand. I was reading about it because I am about to trade in my old evo for $150 off of an HTC Evo View 4G, so I pushed the latest RUU to my old phone to trade it in with no issues.
[EVO 4G Q&A, Help & Troubleshooting] Sheetzie03:
no if you look at the top of page 3 of this thread hip pointed me to a tutorial which included the unrevoked s-on tool, ruu 3.70(i think) which brought me to 2.2 stock not 2.3 so no it wasnt the latest ruu. Im definately on 2.2, not 2.3 thank goodness.

all i know is i followed the direction. Im back to stock 2.2, it still says s-off, yet when i try to install root only apps it will not let me because it says im not rooted. Oh man soo confused, i wish someone would come to the rescue.. :(
[EVO 4G Q&A, Help & Troubleshooting] Serial70:
Re-run whatever tool you used to root initially. Sometimes they don't take on the first try as well. I would suggest unrevoked, its the easiest I've seen yet.
[EVO 4G Q&A, Help & Troubleshooting] HipKat:
TBH, it's probably OK that you're still S-Off. I ran S-On and RUU twice and both times, I never even checked to see if it did indeed set me S-ON.

Did you use the PC36IMG version of RUU or the Computer exe program??

Personally, I prefer the PC36IMG. After it ran, did your phone boot up? If it did, are you back to stock?
[EVO 4G Q&A, Help & Troubleshooting] Sheetzie03:
yeah i used the pc36img, i had to rename it exactly pc36img.zip then move that and the unrevokedforever file onto my sd. and followed exact directions.yes phone booted up im back to stock, only prob it still says s-off.

I was going to try it once more but if you think im good i wont. what do you think?

still s-off bu it cannot perform any root privileges.

try one more time or attempt to reroot? if so which reroot method?
[EVO 4G Q&A, Help & Troubleshooting] Sheetzie03:
i figured i would try once more to be safe but i cant because im not able to install a recovery. I put the amon ra file on the root of my sd but when i go into bootloader, it wont reckognize it so I guess im just going to try to root....Im sure ill find a way to mess this up...............
[EVO 4G Q&A, Help & Troubleshooting] HipKat:
hopefully not. I'd just try and re-root and see what happens.

Don't go pulling the battery or anything and tbh, get IRC and go on #HTC-EVO and #unrevokedtest on the freenode and people there will walk you through it and answer any questions.

The guys at unrevokedtest were supercool when I was a noob, rooting for the 1st time.
[EVO 4G Q&A, Help & Troubleshooting] 2k6_tx_dad:
I HAD the same problem

I had the same problem,

After flashing, I couldn't get past the white EVO screen (30 second reboots). I upgraded my HBOOT from 0.76.2000 to 0.97.0000. Wiped and flashed, it worked!! :)
[Desire Q&A, Help & Troubleshooting] Ultrakiller:
Wich rom for daily use with Gingerbread, sense and data2sd?

Tnx
[Desire Q&A, Help & Troubleshooting] Lothaen:
gingersense perhaps or supernova

they are the only ones I can think of which were built for data2sd - but check out the dev section and the index should help :)
[Desire Q&A, Help & Troubleshooting] Pipusz:
http://xdaforums.com/showthread.php?t=809328 Search this thread, and next time, use the search button. It's not that hidden.
[Desire Q&A, Help & Troubleshooting] erklat:
He can manually enable it in every rom that supports init.d scripts. But if his profficiency isn't high enough, I'd agree with you and suggest sticking to droidzone's roms.
[Desire Q&A, Help & Troubleshooting] Ultrakiller:
I ask it here because some roms in your link have bugs and are not daily use oriented. So, im here to know is someone found a stable data2sd rom with GB and sense. In this case search function is not usefull to have feedbacks :)

Regards,

Ultra
[Desire Q&A, Help & Troubleshooting] shankly1985:
The RoM am using now is Droidzone's latest its android 2.3 with sense 2.1 :)
[Desire Q&A, Help & Troubleshooting] hncdesilva:
Sorry for the noob question but is there a guide on how to add Data2sd onto a app2sd ROM? I've searched but all it has done is confuse me :confused:

I'm currently on InsertCoin GB sense 2.1 CM7 1.0.9 and would be grateful if anyone can guide me on how to remove app2sd and install data2sd.

Thanks
[MDA III, XDA III, PDA2k, 9090 Software Upgrading] L]e[G:
Hi in my blue angel I've install the d-two's multirom but first i've run Repart_DOC for format storage, well the file don't have format my storage so the partition on first boot of 6.5 multi rom don't be resized.

It's a problem to install the d-two's android froyo when ready ?

I've also tried to downgrade but not success.

Sorry for my bad english :\
[MDA III, XDA III, PDA2k, 9090 Software Upgrading] L]e[G:
I've solved alone 2 problem in 1 with this post:

http://xdaforums.com/showpost.php?p=5456317&postcount=6

now i've flash under win 7 and use the cab for format storage
[Desire General] nectuss:
Hiya...i have rooted phone with RCMix 2.0 rom and i can't see ads poping up in installed applications. I need ads enabled for some program functions, but it seems that they are somehow blocked. Can i enable disable ads on this Rom somewhere in settings?

Regards, Dave.
[Desire General] Lothaen:
in adblock - if you have that - there's an option to revert hosts

or you could try checking the hosts (in etc) to see if that has billions of ad-entries in
[Bada Software and Hacking General] m4sterx:
I used sandisk microsd 4gb class 4. it works fast but instable...
[Bada Software and Hacking General] NHS2008:
Well, I was frustrated having to reinstall over and over again on my Sandisk 16 c4. So I just installed it on an old Nokia phone no-name Micro SD card of 1gig (probably Class 2).

And it runs perfectly stable! No issues what so ever. I guess that just might be the fact that Android partition is just 419 something mbs. Speed is almost 85% of Sandisk..Only grip is that Media scanning takes considerably longer, it used to be like 40-50 secs with Sandisk, this one required about 3-4 mins..that also at mere 512 mb partition with no media on it. There is no lag or anything. but the size of the card makes it literally useless...
[Bada Software and Hacking General] ScR3w-B4d4:
I have a kingston 8gb class 4...i recommend to stay away from this card because it too slow. It would be good to know what is the best card to use
[Bada Software and Hacking General] dixter:
Presumably a class 10 card is the best?
[Bada Software and Hacking General] ScR3w-B4d4:
Yeh you would think so but it be good to have like a comparison chart of a few cards and how well they perform on both ext2 and ext3 and issues that may occur, tho that sounds like a bit of work as it needs contributions from a few people :P
[Bada Software and Hacking General] Deleted member 2070558:
Sandisk 32Gb class 4, as far as i know, has the best 4k write speed that is good for booting (many read/write on small files) from sd.

Otherwise, if you are interested only in storage performances, go for lexar 16gb/32gb class 10, with a good read speed and excellent write speed (but NOT on 4k). Or even for a cheap Team one.

Sequential R/W results sorted by best write speed
Card Size Class ReadMB/s WriteMB/s Purchased/Bus/User
Team 16GB 10 20.08 19.16 Q211/USB/OptPess
Team 16GB 6 19.60 18.30 Q111/PCI/effdubya
Team 16GB 10 18.24 17.23 Q111/USB/CzarKhan
Sandisk 8GB 4 19.16 15.76 Q408/USB/OP
Patriot 16GB 10 18.63 14.71 Q111/USB/prankmonkey
Sandisk 8GB 2 19.66 13.23 Q408/USB/OP
Toshiba 4GB 4 20.86 12.42 Q110/USB/MrInsane
Lexar 32GB 10 19.87 11.95 Q111/USB/Nick Fritz
Nokia 8GB 4 19.31 11.56 Q109/USB/pspiso
Lexar 32GB 10 20.13 11.38 Q111/USB/bchliu
Sandisk 8GB 2 20.21 11.27 old/USB/piers888
Lexar 16GB 4 19.51 11.20 Q111/USB/Siggi
Lexar 16GB 4 18.26 10.83 Q111/USB/Flannigan
Transcend 16GB 6 16.92 9.86 Q110/USB/tonymy01
Kingston 16GB 4 16.14 9.80 Q410/PCI/OP
Kingston 2GB – 15.14 9.58 Q410/PCI/Adrian
Lexar 16GB 6 16.87 9.34 Q?10/USB/kungfu
Kingston 16GB 4 15.38 8.76 Q410/USB/Hiluke
Sandisk 16GB 2 18.80 7.65 Q110/USB/OP
Kingston 16GB 2 19.99 6.78 Q410/USB/MrMaestro
Nokia 2GB – 15.89 6.75 old/USB/consumerist
Sandisk 16GB 2 20.44 6.62 Q?10/USB/tonymy01
Sandisk 4GB 4 10.21 6.31 Q???/USB/bamboo
Sandisk 2GB – 8.01 6.25 Q110/PCI/OP
Sandisk 32GB 4 20.05 6.17 Q211/USB/Hansel
Team 32GB 4 10.81 6.07 Q211/USB/OptPess
Sandisk 16GB 4 10.37 6.04 Q410/USB/LeChuck
Sandisk 32GB 4 19.94 6.02 Q211/USB/Zadax
Sandisk 32GB 4 19.29 6.00 Q211/USB/OP
Sandisk 16GB 4 10.58 5.93 Q410/USB/cj3
Sandisk 32GB 2 13.46 5.77 Q410/USB/OP
Sandisk 32GB 2 13.95 5.45 Q410/USB/LeChuck
Sandisk 8GB 4 8.01 5.62 Q410/PCI/yotta
Sandisk 8GB 4 8.00 5.60 Q410/PCI/Adrian
Samsung 8GB 2 14.33 5.30 Q310/USB/cj3
Sandisk 8GB 2 12.33 3.73 Q410/PCI/yotta
Sandisk 16GB 2 14.18 3.68 Q310/USB/CzarKhan
Sandisk 16GB 2 8.73 3.44 Q310/USB/warakawa

Random 4k R/W (QD=1) results, sorted by best 4k write speed
Card Size Class ReadMB/s WriteMB/s Purchased/Bus/User
Sandisk 32GB 2 1.130 2.863 Q410/USB/OP
Sandisk 32GB 4 3.241 1.752 Q211/USB/OP
Sandisk 32GB 4 2.888 1.663 Q211/USB/Hansel
Team 32GB 4 2.560 1.613 Q211/USB/OptPess
Sandisk 32GB 4 2.747 1.471 Q211/USB/Zadax
Sandisk 16GB 2 0.761 1.295 Q310/USB/warakawa
Sandisk 4GB 4 2.473 1.035 Q???/USB/bamboo
Sandisk 16GB 2 1.263 0.307 Q310/USB/CzarKhan
Kingston 16GB 2 3.452 0.056 Q410/USB/MrMaestro
Sandisk 8GB 4 3.457 0.039 Q408/USB/OP
Sandisk 8GB 2 3.744 0.018 old/USB/piers888
Sandisk 8GB 2 3.321 0.018 Q408/USB/OP
Nokia 8GB 4 3.381 0.017 Q109/USB/pspiso
Kingston 16GB 4 3.473 0.016 Q410/PCI/OP
Toshiba 4GB 4 3.599 0.016 Q110/USB/MrInsane
Lexar 16GB 4 3.750 0.010 Q111/USB/flannigan
Lexar 32GB 10 5.468 0.008 Q111/USB/bchliu
Lexar 32GB 10 5.233 0.008 Q111/USB/nick Fritz
Lexar 16GB 4 4.275 0.008 Q111/USB/Siggi
Team 16GB 10 3.487 0.006 Q111/USB/CzarKhan
Team 16GB 10 3.248 0.006 Q211/USB/OptPess
Team 16GB 6 2.841 0.006 Q111/PCI/effdubya
[Bada Software and Hacking General] pao9195:
my microsd is Transcend 16gb class 2, is it better for android porting?
[Bada Software and Hacking General] ShadowAS1:
I've got an Kingston class 6 4GB works excellent
[Windows Phone 7 Q&A, Help & Troubleshooting] mrdaco:
I try to instal NFS undercover and instalation faild. I try it several times, but now I noticed that instalation occupy space on my storage (several times x 150Mb). So I wonder, is thare any way to clean up these faild data, to make some space on my Omnia 7 ??
[Windows Phone 7 Q&A, Help & Troubleshooting] dkp1977:
How did you actually find out that the failed installations consume space on your storage?
[Desire HD Q&A, Help & Troubleshooting] high_voltage:
Now, I was using 5.2 flashed over 5.1.11, now I decided to do clean installation(after wiping).

I did full_wipe_1.5_ext4--->then used format_data_to_ext4 from the first post in this thread--->get error when I tried to install 5.2(the md5 is ok, I installed it from this zip).

Then I tried again to full_wipe...and I get error in it--->then I tried full_wipe 1.3(worked)--->format_data_to_ext4(worked without error)---->but when I tried to install the rom(5.2) I got "formatting partition proccess--->e: error in /sdcard/android_rev....5.2.zip (status 1)

So, I am without any rom, can't install... I guess I ****ed it up when I applied format_data when I started. Now I will be thankful if someone join realtime to help me, I guess it's got something to do with mount/unmount but I don't know what exactly to m/un, and I don't want to **** it up more. Someone for steps on repairing this and install clean 5.2?
[Desire HD Q&A, Help & Troubleshooting] high_voltage:
For deleting. The problem emerge because I needed to manually unmount /cache... strange.
[G2 and Desire Z Q&A, Help & Troubleshooting] NiklasNikke:
Hi there!

I'm new to this whole thing, however I managed, with some help from a friendly guy on the IRC channel to get my device rooted. First thing was to downgrade my firmware as it was too high (1.84) to 1.34, I think. After this downgrade I noticed that the keyboard has become buggy and the WiFi not working.

I then flashed a new ROM (wiping first etc) built on firmware 1.85. The problem with the _Keyboard_ persisted, the WiFi issue was now fixed. Then I installed CM 7.0.3 (wiping first etc) and it works wonderful, however the keyboard issue still persist...

What I mean when I say the keyboard is buggy:

It's only a few letters to the right of the keyboard, and I think the keys are, I, K, M, L, O and P. Sometimes it will not react when pressing the key other times it will print out the letter TWICE. The problem persists in caps lock mode, but IS NOT an issue when being in FN / ALT mode (Special-characters-mode)

I did not drop the phone or anything, and have never-ever experienced it like this before. But I felt this bug like 5 minutes after downgrading...

I really do not hope this is a hardware issue.

Regards
[Galaxy 3 General] Mohanshbhr:
I have just 2 questions please someone answer-

1. I made my own custom rom based on jpm and i added a lot of apps in /system/app. Is adding lot of apps cause battery drain?

2.Is jpq base drains much battery than jpm base?
[Galaxy 3 General] jarek3460:
Depending on the

number of

applications running,

the phone will be

discharged faster.

Depends on what

application is load have

the CPU and the

stability of the rom.
[Galaxy 3 General] Azax:
U need to see what apps are running in the task manager? also disabling the gps when not in use and maybe if you have bluetooth running disabling that as well will help. If im using my phone a lot through the day it chews up abt 60% of the battery but when not using too much then i get abt 40% to 30% drain.. i have not found that installing more apps drains the battery more, its just whats running that affects the battery imo. also if u get great reception then there is less battery drain because the phone is constantly trying to get a better signal. disabling wifi when not in use helps as well..
[Thunderbolt Q&A, Help & Troubleshooting] nocode99:
I recently messed up my HTC Incredible and thinking about getting this phone off ebay/craigslist. My question is, is it easy to change the CDMA from phone to phone? I wasn't able to really see any instructions online specifically for these phones. Also, am I obligated to get a 4G enabled on the phone from Verizon?

Thanks
[Thunderbolt Q&A, Help & Troubleshooting] ProTekk:
Yes and yes.
[Thunderbolt Q&A, Help & Troubleshooting] nocode99:
Thanks - are there any tutorials on changing CDMAs? I'm having a hard time finding anything through Google.
[Thunderbolt Q&A, Help & Troubleshooting] ProTekk:
What exactly do you mean by "changing CDMA's?" Do you mean switching the phones out on your line?
[Thunderbolt Q&A, Help & Troubleshooting] nocode99:
Yeah - I want to switch my line from the old incredible into a new phone. Should I just go to Verizon and have them program the new phone?
[Thunderbolt Q&A, Help & Troubleshooting] g00s3y:
CDMA != GSM

I believe you might be confusing swapping out a SIM card for transferring your number to another phone. You can get the phone off of eBay or CL, go to your local VZW store, and just have them transfer your number to your new phone. I believe the TB should come with the 4G LTE SIM card (has nothing to do with a GSM SIM card). If not I'm sure when you go to VZW to activate the phone that they will give you one there.
[Thunderbolt Q&A, Help & Troubleshooting] ProTekk:
I'd recommend going to Verizon because you need to get a SIM card to activate the device anyway. Head over there and tell them that you're switching your DInc out for the Thunderbolt and that you need a SIM for it. They can activate it on the spot for you.

Even if he did get a SIM card with it, that SIM is not tied to his number. I'd still suggest going to Verizon and letting them handle the situation.
[Thunderbolt Q&A, Help & Troubleshooting] mr_schticker:
As someone who just purchased a TB this way I can confirm: just walk into a corporate Vzw store and they'll give you a new sim (free) and activate your phone.

Kind of annoying having a sim like that, we used to be able to change equipment on he fly through Vzw.com or over the phone.
[Thunderbolt Q&A, Help & Troubleshooting] RunNgun42:
VZW's 4G phones still use ESN numbers too. The sim is just to get access to the 4G network. You will want to make sure the phone you are buying has a clean ESN number. If VZW has it flagged as stolen or something, they wont activate the phone for you and there's nothing you can do.