yashsingh1/xdaforums huggingface dataset:
[Xiaomi Redmi Note 3 Questions & Answers] Denis:):
Hehe i had sgs3 like 3 years ago :p then also had sgs4 and mini cool little device...it was best when it came out :p

its best if you download official fastboot ROM for your kate, prepare MiFlash and all drivers installed according to guide how to flash bricked or edl flash.

Put kate in sleep, volume down + power( you are in fastboot)

Then there is bat file which puts your device id EDL mode (kate is showsn as COM20 or some number), flash, let miui boot, flash twrp and backup all partitions...then you dont have to worry...just restore modem or efs if you lose wifi and sim while flashing roms
[Xiaomi Redmi Note 3 Questions & Answers] Frenzi2012:
very thanks! I have sgs3 working on nougat REmix N 5.8.1 now, I use it for 5 years:cool: . I'm buying an RN3SE. I hope I do not regret it.

---------- Post added at 02:13 PM ---------- Previous post was at 02:04 PM ----------

What TWRP you flash ? In other guides replace recovery.img in ROM before flashing.
[Xiaomi Redmi Note 3 Questions & Answers] Denis:):
You will unlock unofficialy?

I unlocked officially...its easy..requested unlock, unlocked it next day via fastboot with MiUnlock on latest china dev

Use any twrp...doeant matter as long you can backup all partititons...you only need to that once
[Moto G4 Play Questions & Answers] mkollersms:
So I was wondering how many of you had gone through with implementing the buildprop change that enables Google AI. I decided to do it the other night and have been fiddling around with it since then. If you haven't done it, it basically turns Now-on-Tap into "Voice Search by default," but you can still do screen searches for things like USPS Tracking and Phone/Address Lookup. Voice searches are vastly improved; it will auto-start Navigation, fetch links as a list of cards (for example, miniaturized news feeds), open apps instantly (provided the phone isn't locked), and essentially just be all around snappier than Google Now/Now-on-Tap.

That said, it does bother me that the phone literally had to be rebranded as a Pixel to make this work. A) It's not the most stable change, and 2) that change is now reflected on any device/prompt that interacts with my phone. It managed to be picked up by adware on a sketchy site (don't ask what sketchy sites I go to), and my desktop also mislabels it on USB connection. Does anyone know if Motorola allows you to change the device name for USB connection? I know LG lets you.

But yeah, those are my thoughts on it. I might try it out for a week or two, and if I'm not exactly bowled over by it, I'll probably just go back to Now-on-Tap. But I wanted to hear your guys' thoughts.
[Moto G4 Play Questions & Answers] nysascape:
I don't even use now-on-tap, and I've done the assistant bulildprop trick before, and it made little to no difference on how often I use both of them. I understand what you mean by having to rebrand it to a pixel though - Google shouldn't make this Pixel exclusive
[Mi 3 Android Development] NeroD:
DarkNess reDefined​

redefining the darkness in you !​

DarkNess reDefined offers features and stability to the core, The main focus of the team was to make a ROM with features that are required not just bloats being tons of features to keep you thinking what to use and what not to. Apart from features we habe keptin mind the stability of the system, After intense testing and positive user reviews we've finally decided to release the build.

Status Bar

Network Traffic

Quick Settings

Bluetooth Device Battery Status

Statusbar Icon

Clock and Battery Adjustment

Brightness Control

Double-Tap to Sleep

UI

Animations

Force Expanded Notification

Disable Immersive Mode Message

Three Finger Screenshot

Power + Volume Up to Start Screen Recording

Power + Volume Up to take Partial Screenshot

Recent

Hide Apps from Recent Panel

Buttons

Hardware Key Configuration

-Backlight Control

-Key Custom Actions

Power Menu Configuration

Navigation Bar Configuration

-Enable/Disable Navigation Bar

-Fling

-Height and width of Nav Bar Control

-Pulse

Misc

Volume Steps

Screenshot Sound

Media Cover Art

Superuser Indicator

Launch Music Player when Headset Connected

ROM Extra

Snapdragon Camera

Snapdragon Gallery

OMS

Latest Official Release

Download the ROM and Gapps

Boot into recovery mode

Wipe System/Data/Dalvik Cache/Cache

Flash ROM and Gapps zip file

Reboot and enjoy the power of Darkness !

[IMG="GIT"]https://raw.githubusercontent.com/Darkness-reDefined/reDefinition_assets/graphics/our_git.png[/IMG]

Click Here​

Contributors

LineageOS (Base)

Resurrection Remix (RR)

Slim Roms Team

ParanoidAndroid Team

DU Team

AICP

AOKP​

Our core team

@AKabhishek

@DarkKnight6499

@kishpatel

@warlord_rk

@TheDarkStrix​

XDA:DevDB Information

[ROM][7.1.1_r9][OFFICIAL] DarkNess reDefined [OMS/DUI], ROM for the Xiaomi Mi 3

Contributors

NeroD

ROM OS Version: 7.x Nougat

ROM Kernel: Linux 3.4.x

Based On: LineageOS

Version Information

Status: Stable

Created 2017-02-11

Last Updated 2017-02-11
[Mi 3 Android Development] zx604176460:
Download now Thank you for your great work
[Mi 3 Android Development] zx604176460:
This is some photo sharing. Thank you
[Mi 3 Android Development] pu3aditya:
I just installed the ROM. I love it. but no one wants me ask, is there is no browser application and downloaded apps ?? I've looked it up in the app drawer, but there is no application that downloads

sorry bad my english, i'm indonesian
[Mi 3 Android Development] pu3aditya:
No update ??
[Mi 3 Android Development] thinhx2:
but since [MENTION=5100891]NeroD[/MENTION] doesn't update for a long time, i share new build of DnD at here

v1.5: https://drive.google.com/file/d/0B_1n-AjklZSLZk1uMTBTMklDdDA/view?usp=sharing
[Windows 10 Mobile] saarakura:
Hi, yesterday needed to find what ip i get from USB-RJ45 ( OTG ) on my lumia 950, but i cant find it anywhere, the networking is working fine, but i wonder...there is any way to find what ip i get from this new interface???

Thanks and sry if i create in the wrong section.
[Windows 10 Mobile] augustinionut:
Maybe here: 127.0.0.1/wifimanager.htm
[Windows 10 Mobile] saarakura:
Very thanks!!!!
[One (M8) Q&A, Help & Troubleshooting] solaris2k7:
Hi and sorry if my question has already been answered.

I have a rooted htc one m8 (team-s rom) and my device is S-ON.

I want to return back to stock rom. I do not care about the boot warning message and I do not care not loosing root. I just want to install the official Rom and maybe keep it rooted. Is that possible?
[One (M8) Q&A, Help & Troubleshooting] ahmed.ismael:
you have tow options

1-flash RUU if it's available for your device variant

2-restore stock backup from this thread ( read all the first 5 posts ) http://xdaforums.com/htc-one-m8/help/tutorial-how-to-stock-stock-twrp-t3086860

if you don't know how to choose the right files,post the result of fastboot getvar all ( after removing serialno and imei )

P.S if you will restore a backup ( or flash another rom ) you need to flash the firmware first since s.rom modified the adsp.img you will have issues with audio on all roms excep s.rom
[Tilt, TyTN II, MDA Vario III General] lansa:
Whenever I have Live Search open and using the map feature with GPS, if a call comes in, I lose all sound and have to reboot the phone, otherwise I cant hear the caller and he cant hear me. This has happened twice so far. Using Dutty's Nu-Skool ROM with Radio 1.27.12.17

Anybody else experience this?
[Tilt, TyTN II, MDA Vario III General] flexte:
i lose sound at least once a day and i do use ms live search. i will look to see if that program is open next time it happens. i though it was a BT issue but could be live search.
[Tilt, TyTN II, MDA Vario III General] lansa:
its definitely live search thats causing it.....
[Xperia Z2 Q&A, Help & Troubleshooting] viictor_loca:
I'm having a problem with my z2. When I make a call or receive one, the display go black and it stays that way. I can't end the call, nothing works! Not even power button.
[Xperia Z2 Q&A, Help & Troubleshooting] iXaidyiu:
Even when in hands-free mode?
[Xperia Z2 Q&A, Help & Troubleshooting] viictor_loca:
The moment I press the call button, display goes dark
[Xperia Z2 Q&A, Help & Troubleshooting] iXaidyiu:
It seems you have a faulty proximity sensor, go through Diagnostics and see what's the result?
[Xperia Z2 Q&A, Help & Troubleshooting] viictor_loca:
That's it! It vibrates even if I'm not blocking the sensor.

Any idea on how to fix this? Do I have to flash anything?
[Xperia Z2 Q&A, Help & Troubleshooting] viictor_loca:
Nevermind I just found the problem. It was my screen protector that was causing this problem with my proximity sensor.
[Xperia Z2 Q&A, Help & Troubleshooting] iXaidyiu:
Restore stock FTF using flashtool and we user data, then re-diagonoses, if it still mal-function, it should be a hardware issue.
[Xperia Z2 Q&A, Help & Troubleshooting] viictor_loca:
Nevermind I just found the problem. It was my screen protector that was causing this problem with my proximity sensor.

Thank you very much for your quick reply
[OnePlus 3 Questions & Answers] jose_pagio:
Hi,

I've downloaded the 4.0.3 OTA update from here and put it on my /storage/emulated/0 folder, as you can see.

I wonder if it's possible to update from 4.0.2 to this 4.0.3 with this "Local upgrade" feature, instead of rebooting Safe Mode, flash the zip, reinstall SuperSu, etc.
[OnePlus 3 Questions & Answers] TNSMANI:
If you are totally stock (without root or any other mods), you can attempt that. But since you seem to be rooted, may be with TWRP etc, the update this way will not work.
[OnePlus 3 Questions & Answers] jose_pagio:
Yeah. I'm rooted, TWRP and custom kernel.
[OnePlus 3 Questions & Answers] TNSMANI:
Then download the full zip (about 1.47 GB) and flash it through TWRP. If you are in doubt, there are many guides here, so search for them.
[OnePlus 3 Questions & Answers] Rohela:
I just flashed stock recovery and flashed the update and reinstall TWRP and SU. Didn't loose any data. :good:
[XDA Assist] jmtt89:
Hi Guys,

Please help me :crying: :crying: :crying: i get a cheap Chinese smartphone PHOSH S350A (according with the sticker behind of battery xD) i follow all basic steps to flash rom to smartphone:

- Download flash tool and the rom from needrom

- Load a scatter file

- Select option "Format all + Download"

- Click on "Download" , after that connect a phone without battery

- All process work fine and the UI show a OK message

- The phone don't turn ON again :crying:

The sticker behind the battery:

POSH Orion Mini

Model: S350A

Designed by POSH USA. Assembled in China.

IMEI 1: ....

IMEI 2: ....

S/W: S350A/MTK6572/V2.0

H/W: S350A/MTK6572/V1.0

FCC ID: 2ABN6S530

I hope someone can help me to unbrick my phone :crying:
[XDA Assist] xanthrax:
Hi !

Here are some steps for updating this device

https://xdaforums.com/general/general/posh-s350a-mt6572-t2974728

Good luck !
[Xiaomi Redmi Note 3 Questions & Answers] moeinkd:
hi

which one is better cm or lineage os rom for redmi note 3 sd?

Is it necessary or recommended to install kali nethunter on cm rom ?.or it can install on miui global stable rom?

What is the best way to install kali nethunter on rn3 sd?

Please put this tutorial link for install kali net hunter on rn3 sd

gratitude
[Xiaomi Redmi Note 3 Questions & Answers] Mohit 22:
Lineage is better than cm.

Nethunter can be installed in miui global stable rom too

U have to flash net hunter via twrp
[Moto G4 Plus Questions & Answers] Mikxx:
I want to dualboot stock ROM (unrooted) next to my RR ROM because i want to play pokemon go i flashed the twrp backup and it worked with twrp and stuff i played and i flashed elementalx kernel and rebooted and it kept loading on the login screen i dirty flashed only the system part of the backup and i deleted the app data and i kept getting the problemen any ideas ? Thanks in advance
[Moto G4 Plus Questions & Answers] WallyWest:
I don't think there is a way to dualboot stock ROM with a custom ROM
[Moto G4 Plus Questions & Answers] Mikxx:
It is possible i just need a flashable stock ROM tho
[Moto G4 Plus Questions & Answers] WallyWest:
i want that too but i don't think there is a way i tried flashing RR through dualbootpatcher on stock ROM but it didn't work
[Moto G4 Plus Questions & Answers] :
Try this procedure:

1. Set Stock ROM as primary (modified with EX kernel and rooted with either phh SuperUser or SuperSU).

2. Install and patch using DualBoot patcher.

3. Install the secondary ROM is the /data partition, or elsewhere, not the /system partition.

4. Dualboot?

You cannot have a flashable stock ROM. You can try using your own backup, though I'm not sure that would be helpful.
[Moto G4 Plus Questions & Answers] WallyWest:
I tried it on both Stock Marshmallow and Nougat many times before it doesn't work
[Moto G4 Plus Questions & Answers] Mikxx:
after reconcidering im not going to do this because if i root my phone again pogo wont work
[Moto G4 Plus Questions & Answers] Mikxx:
edit

porting the stock rom to make it flashable trough twrp is entirely possible if seen it on numerous devices just not on this one...
[Moto G4 Plus Questions & Answers] WallyWest:
Flash this ROM https://xdaforums.com/moto-g4-plus/development/rom-jx-s-creampie-nougat-t3554937 through TWRP then flash RR through Dual boot patcher
[Moto G4 Plus Questions & Answers] MisterSteve:
Couldn't you just go back to stock rom, reinstall TWRP, do a backup of stock rom, re-root and reflash RR, then just restore your backup of stock when you want to play pogo? Not sure if it will work, just an idea.
[Moto G4 Plus Questions & Answers] WallyWest:
For just playing a game that's too much to do
[Moto G4 Plus Questions & Answers] pastorbob62:
You might try the ROMs at this link. They are flashable from TWRP and the Modem firmwares are available also.

https://xdaforums.com/moto-g4/development/fxz-athene-twrp-flashable-fastboots-t3562147
[Moto G4 Plus Questions & Answers] Mikxx:
Thanks for the response but i found a way to make pogo work on custom roms possible so this is not needed anymore :)
[Moto G4 Plus Questions & Answers] WallyWest:
Which way
[Moto 360] Kokela:
I dont know if anyone could help... my moto 360 got updated to 6.0.1 and the watch when pairing with the phone starts freezing like hell and android wear inst responding error occurs randomly and process isnt working close it now error occurs . i cant even use the watch because it is sooo sluggish and would do nothing and it becomes hot causing the battery to die withinin 1.5 hours. help!!!!

Would it be a good optuon to root it or anything please suggest i love thewatch but its killing me cant even use it urrrggghhh!!!!
[Samsung Gear S3] Amin101:
Hi

Could someone please upload the apk file of "Facer Companion for Gear S2 & S3" ???
[Samsung Gear S3] k_m_kh:
امین جان چیزی گیر نیاوردی ؟منم در بدر دنبالشم

:(:(:(:(:(:(

---------- Post added at 11:15 PM ---------- Previous post was at 11:14 PM ----------

---------- Post added at 11:21 PM ---------- Previous post was at 11:15 PM ----------

Can anyone Help US ??? i have this problem too . please Upload Facer Companion app for Gear S2&S3 here for Us . I CANT FIND THIS FILE . IT IS NOT EXIST IN OUR Galaxyapp Market !!!!
[Samsung Gear S3] SiNJiN76:
Maybe email the developer and they can send it?
[Samsung Gear S3] k_m_kh:
I dont Know ... maybe . but the esey way is that other guys uploud this app in this Page . ;)
[Samsung Gear S3] SiNJiN76:
I could try...do i need to be rooted? Cause I'm not...
[Samsung Gear S3] k_m_kh:
hi . no need to root . you can use

ES File Explorer

to make a backup of your apps . then you can Uploud or copy or Move your apps to anywhere you want . thank you for answer
[Samsung Gear S3] SiNJiN76:
It doesn't show the companion app...which is on the watch, right? Just the phone app.
[Samsung Gear S3] k_m_kh:
i know . but facer companion app is installed on your phone !!! . ES file Explorer should show it !!!!
[Samsung Gear S3] SiNJiN76:
Well...there is only one Facer app that comes up when I search Facer. Does the companion app have a different name?
[Samsung Gear S3] Adrenalin101:
I'm in Canada and I am also having this issue
[Samsung Gear S3] sparky 4066:
Bump... Anyone have luck getting this??! Support not helping

Any updates from generous people here for APK? Support contacted and can't provide, blames Galaxy store for not having it and waiting for them to address

Please share someone
[Samsung Gear S3] cmario92:
Any luck with this? still can't download the companion app in my country
[Samsung Gear S3] xxxnewman:
Same issue here.
[Samsung Galaxy S7 Edge Questions and Answers] scndts:
Is it necessary to use the "Encryption disabler" file when rooting the S7 Edge?

One of the online guides to rooting the S7 Edge says to flash the no-verity-opt-encrypt.zip file in addition to the SuperSU one. I've, however, seen other guides that make no mention of the encryption file. What exactly does it do and is it necessary for rooting the S7?

Thank you.
[Samsung Galaxy S7 Edge Questions and Answers] Misterjunky:
re: no-verity-opt-encrypt

That's due to the fact that many roms have that "no-verity-opt-encrypt" built into the rom itself.

And yes it is necessary and it's always best to follow the flashing/installing instructions.

It's best to follow the instructions given in each of the different custom rom threads.

Good luck, have a great day!
[Samsung Galaxy S7 Edge Questions and Answers] scndts:
Thank you very much for your quick reply. I haven't installed a custom ROM yet. The two tutorials were virtually the same apart from the encryption file, and I was curious as to what the encryption file did.
[Wing, P4350 General] umchriswho:
All right so I went here:

http://xdaforums.com/showthread.php?t=345347

I downloaded the File.

Download RUU_Signed.nbh

Now I'm stuck...I don't know what to do with the RUU_signed. where am i suppose to put it?

can anyone help me?
[Wing, P4350 General] papamopps:
download also a herald RUU here:

http://rapidshare.com/users/5EWZ4

unrar it!!

then delete the SPL.nbh (i guess hard-spl worked for you???)

replace the RUU_signed.nbh with the one from touchit3.0 thread!!

run the RomUpdateUtility.exe
[Wing, P4350 General] ivanmmj:
...

You already asked me that. I told you the following:

EDIT

*stretch* Ok. I'm awake now and not grumpy anymore. Sorry. :-p
[Sony Xperia XZ Questions & Answers] spike277:
Is the WLAN Call Function with the XZ Dual Firmware possible? Because with my single Sim Version i've found the Function only in the Germany Customized Firmware.
[Sony Xperia XZ Questions & Answers] jeffrey7701:
Hi

Yes it's possible. I live in Hong Kong and use customized HK Firmware.

Sent from my Sony Xperia XZ Dual
[Sony Xperia XZ Questions & Answers] spike277:
Great.. ? Thankyou. then i Flash this version.
[Sony Xperia XZ Questions & Answers] spike277:
As expected: WLAN Call does not work here in Germany (O2) with XZ Dual Sim Version ? The menu item is not here... With my Single Sim Version it works. Is there any way to activate manually in the settings? My device is rooted.
[Sony Xperia XZ Questions & Answers] jeffrey7701:
I have the option in Settings.

Sent from my Sony Xperia XZ Dual
[Sony Xperia XZ Questions & Answers] spike277:
I think it´s a Problem with the Provider (O2) here in Germany in combination with the F8332 (DualSim). This phone is not to buy officially here in Germany. With my F8331 (SingleSim) it´s possible to activate Wlan-Call in the Settings and it works with it. Do you have an Local Provider in HK?
[Sony Xperia XZ Questions & Answers] jeffrey7701:
Yes, Smartone, Three HK, PCCW and China Mobile. All 4 have Wi-Fi Calling and VoLTE. Our phones here are all Dual Sim.

Sent from my Sony Xperia XZ Dual
[Galaxy Note II Q&A, Help & Troubleshooting] niko3132:
Did somebody made the game work on the note2 ? i badly want to play this but im wondering if it actually works on an old phone.
[Galaxy S 5 Q&A, Help & Troubleshooting] TNewton:
So, after all my posts. I actually dropped my phone. My screen doesnt flash green anymore, but my gyro wont work on Custom Roms now. So I cant argue that the motherboard needs to be replaced.

So talk to me about what needs to be done software wise after you replace a motherboard. I am a tinkerer, but I think I will leave this for the repair shop to do. But I dont know if the shop will install he rom, or if the rom will be preinstalled.

Really new in this area and want to be prepared.

So those who have had to replace the motherboard. What happens next.

Again thanks for all the help.
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] lemlis:
Changelog:

Changelog:V.2

Version 3.Finall-coming soon after XX/XX/2017 STABLE published version Linaro Cherry Kernel

Version 2 Included:

-Kernel--Linaro Cherry Kernel 3.10.63 Version: 1.1.5_stock

-CPU Min 533Mhz-- Max 1190 Max

-No Root

-Deodexed

-Zipaligned

-Debloated

-DeKnoxed

-SBrowser_5.2

-Camera Samsung J7

-SmartManager Note 5

-SVoice

-Optical Reader

-My Files

-Keyboard S7

-CommandCenter widget

-Scroll Capature

-TouchWizHome2016 Stock/GalaxyLabs 6.0.1

-Ui sounds

-Walpapers Note7

-Call Record

-Call Block

-Camera shuter sound

-sound patch

-build.prop tweaks

You can Install this apk like simple apk. In any stock Rom or my mods

-

SBrowser 5.2

-

View attachment 4037605

-

View attachment 4037935

--great widget

This install from TWRP:

View attachment 4046002

Camera4_J7.zip

View attachment 4064001
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] wolty:
Nice ! Please add screenshots :)
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] Demicro:
Now I know why I had not read anything about you for days. You were making a rom ???

I am downloading lineage to try to create a rom. I've never done one. I will have to read many online tutorial
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] romireverend:
I try your rom ? go to download now ?
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] Demicro:
The level of the security patch was made by my great-great-grandfather

??????????

1917
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] lemlis:
October Uprising of 1917. on 25 October (7 November, New Style) 1917.

:D:D:D:D:D:D:D:D

security patch made by Lenin (for example, in the first editions of Lenin's complete works)
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] Papeekruts:
suitable for J510GN?
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] lemlis:
Must be -yes.
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] wolty:
Can you add mirror links for download? :)
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] RicardoArantes:
I have a stock j5 2016 510 FN so I should have no problem installing this rom right?

And also, will I be able to remove root after installing the rom? Because some apps like Pokemon Go don't allow rooted phones

Thanks in advance
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] Ruch06:
Maybe you should add support for all devices of you kernel firstly?

It will be great!
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] rodrigo82:
Thanks!

I'll try on my J510MN to see if it's compatible.
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] mrandor:
Is this possible to unroot this rom? I would like to have nfc pay.
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] harry167:
Testing on SM-J510F.

________

Working Good Thank You ! :) <3
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] Demicro:
You already installed it?
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] harry167:
Yes working good
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] lemlis:
yes of course you can remove root after installing.

I have not tried without Root.

But without root with Kernel Adiutor you can not set CPU and CPU always run at maximum mode Max 1881 Min 200 and GPU 720

If it's good for you,then is no problem.
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] RicardoArantes:
Can I make the changes you mentioned above in previous posts and then remove root? Will the changes still be active?
[Samsung Galaxy J5 (2016) ROMs, Kernels, Recoveries] lemlis:
Not. After reboot without root setings willbe Max 1881 Min 200 GPU 720