ROMs - General Topics

Can someone explain this to me. The storage in a device is in the ROM of the device. When you flash a cooked ROM it is in the ROM of the device. So are these in the same areas? When you look in /windows is that file what you flashed in or is it a copy? Where does all the space go?

generaly the full storarge is 128mb. the roms that are coocked are about 53-57mb unless the extended storage is included in the coocked version so it might be about 72mb (i think)
When you flash rom the computer loads the files into the phone, then the bar reaches 100% and a long wait before the phone reeboots. The rom files are locked for good; whatever aplications or upgrades you put into it do not overwrite any of the files in rom. so that when you hard reset only the original ROM files stay in the rom and all of the stuff you put into it are wiped clean.
The extended rom (correct me if Im wrong) is actualy located in the ram (usualy 10mb) This is the place where your carrier installes their programs and settings they desided are right for you. some developers also use the extended rom to put in their fixes.... However, all of that still gets installed into main device memory
Then there is a pagefile (from 4-8-12mb in some cases)
That leaves whatever miniscule remains for available storage and ram.
I hope that this is clear.

Can you just delete/add stuff to the extended rom or not?

S.V.I said:
generaly the full storarge is 128mb. the roms that are coocked are about 53-57mb unless the extended storage is included in the coocked version so it might be about 72mb (i think)
When you flash rom the computer loads the files into the phone, then the bar reaches 100% and a long wait before the phone reeboots. The rom files are locked for good; whatever aplications or upgrades you put into it do not overwrite any of the files in rom. so that when you hard reset only the original ROM files stay in the rom and all of the stuff you put into it are wiped clean.
The extended rom (correct me if Im wrong) is actualy located in the ram (usualy 10mb) This is the place where your carrier installes their programs and settings they desided are right for you. some developers also use the extended rom to put in their fixes.... However, all of that still gets installed into main device memory
Then there is a pagefile (from 4-8-12mb in some cases)
That leaves whatever miniscule remains for available storage and ram.
I hope that this is clear.
Click to expand...
Click to collapse
Yep, absolutely agree with ya 100 % dude, ain't nothin to it.

Related

OLTP's rom upgrade & BIG Storage guide

Hi all,
Almost everytime I check the forum I see a lot of rom upgrade & BIG Storage questions. Apparently not everyone is familiar with the wiki and search options on the board. That's a shame cause almost all the questions are answered in the already existing threads. So why a new thread about the same topic?
1. I'm chauvinistic and want my name on the board ;-)
2. To aggregate a part of my knowledge in one place for easy access.
3. To promote the wiki
- So if you tried to upgrade your rom and got an error 120: follow this description http://wiki.xda-developers.com/index.php?pagename=MagicianRomUpgrade
- If you failed in upgrading your rom somehow & now you're stuck in the bootloader: just make sure usb connections are allowed in Active Sync, connect your magician with usb to your PC and run the rom upgrade program again.
Sometimes it helps at this stage to downgrade ActiveSync to version 3.8 (see the post from benenglish).
- If you need to go to bootloader for any reason (including incorrect rom upgrade) press 'camera, power and soft-reset' all at the same time for some seconds, till your screen fades and reads: Serial V1.0x. When you connect it to usb it should read ' usb V1.0x
- If you want to change the language from your magician (not including from or to Greek, cause those roms and devices are protected), just use http://wiki.xda-developers.com/index.php?pagename=MagicianRomUpgrade again.
- If you want to flash your magician with a charmer or any other rom, please don't you will loose your device when you kill your bootloader and that's very likely to happen while flashing a not suitable rom.
- Want a WWE BIG Storage rom the easy way? Follow http://wiki.xda-developers.com/index.php?pagename=MagicianRomUpgrade and download ftp://xda:[email protected]_NK.nbf/BIG_Storage_nk_for_rom_1.13WWE.zip This NK.nbf is patched for BIG Storage, you only need to put it in the directory with the extracted shipped-rom.
- Want a BIG Storage rom in any language the easy way? Download a shipped-rom from the ftp or any telco and follow http://wiki.xda-developers.com/index.php?pagename=MagicianRomUpgrade
- Want to get BIG Storage via a SD Card flash, read it here http://wiki.xda-developers.com/index.php?pagename=MagicianSDflash
- Don't know what BIG Storage is? It is your ext-rom (with the operator customization cabs) exchanged for a larger internal Storage folder. So remember to backup those cabs before upgrading.
- When you want to revert from BIG Storage to the original Storage and ext-rom combination, make sure you put > 8MB data in your Storage folder before flashing it back with a normal rom. Otherwise you'll loose your Storage folder completely :-(. Seems that this might be a solution & doesn't work for everyone. Try it if reverting with empty \Storage folder isn't successful.
Any questions left, I guess so. Now don't be scared and put them on the board, nobody is going to eat you (at least not straight away) and someone will answer.
But remember that when this topic is still visible in the first page of this board I will probably stop answering new threads about BIG Storage and rom upgrading questions, I've done that for 5 months now and I'm starting to loose my interest.
Regards, M
Ps If you're really stuck in a rom upgrade & can't get it working, last resort is to pinpoint me to a location where I can download your rom-dump or the shipped-rom & I can prepare it for you. All it takes is a cup of coffee on my, for now, virtual world trip. Got Italy, Cyprus, Argentina, Asia, UK, Germany, Belgium, Greece, Turkey & US allready. So if you're living in any other country, especially Indonisia, Australia or New Zealand, be my guest.
Great job OLTP..
Your the man :lol:
- If you failed in upgrading your rom somehow & now you're stuck in the bootloader: just make sure usb connections are allowed in Active Sync, connect your Magician with usb to your PC and run the rom upgrade program again.
Click to expand...
Click to collapse
AND USE ACTIVESYNC 3.8
My upgrade was stuck at this stage - removed Activesync 4.0 - Installed 3.8 and ran the firmware update again - its now "Upgrade Radio Stack - Please wait" with the progress bar going along on the screen.
Hope this helps
I've heard/read more complaints about Act.Sync 4.0. Though 4.0 is working flawless on my side, every contribution that works is valuable information. I updated the first post with it.
Thanks
Big storage
I did a big storage for my Mini by using a copy of my rom, changing the bytes as told in the guide to upgrading with a HEX Editor. I have installed programs to new storage gained but my main memory is showing very little memory. I have no programmes installed in main memory. What should I do now ?
How much memory have you got free. I got now, on my fully loaded device, 9.6MB storage & 22.5MB program memory occupied.
Did you happen to load all the cabs you copied from your ext-rom again? Those cabs install in RAM.
Cheers, M
stotage lost
pls help... i lost my storage when i flash my mini in my stock shipped rom i followed instruction of olps to soted data at least 8mb of files but it didnt works still lost my storage...
how can i back it again..is there any hope?..
thanks
First thing to do is to load the BIG Storage rom again. This should give you back the \Storage folder.
Now did you use the same rom version for BIG Storage as your original rom version? Some do claim it needs to be at least the same country version.
So pls try to revert to the same version only without BS & you can always try with an empty \Storage folder.
Seems that some tricks work out different on several devices.
Good luck, M
First thing to do is to load the BIG Storage rom again. This should give you back the \Storage folder.
Click to expand...
Click to collapse
thanks i got my storage is back...
Now did you use the same rom version for BIG Storage as your original rom version? Some do claim it needs to be at least the same country version.
Click to expand...
Click to collapse
yes i flash it wid the same version i followed the instruction on your post to be able to back the extended rom..
ill try again for the 2nd time...ill post if i succed
many thanks oltp
Can I upgrade my Mda compact 2 also with a sd-card like the compact ?
When I make a hardreset with the card in the slot, i cannot chosse to install from sd-card.
That's something I don't know. Try one of the board's for WM5 devices like the Wizard. Maybe you can find your info there.
Success, M
[edit] could you append it here too pls, if you find it?
Hi OLTP,
Right now I have 8.04mb free in storage memory (big hack). In MAIN memory around 3.10 mb in program memory (in use 23.47 mb). Storage (main) - in use 28.29 mb and free 2.55 mb. This keeps going less and less so from time to time as I use and close programs. So I keep doing a soft reset. I get critical memory short error. What do I do.
Should I flash with my saved original ROM (the one I had before doing the hack) and then immediately flash the saved Big Rom ? Please let me know. You are the Guru.
@ Galahad: What kind of software did you install after the update? & how's the memory pressure right after a hard-reset (don't forget to make a proper backup first)?
Do you use cabinstl to install cabs to another location then 'default' (which is RAM)? & tell Act.Sync to install to Storage or Storage Card, otherwise your RAM will be used up very soon.
My advice no need to reflash right now, a hard-reset should be sufficient to see what is causing your prob.
M
After the hack I had installed couple of commercial software, all into storage memory thru active sync which prompts you where you want to install. I choose storage memory (26.92). I keep doing this for all the commercial software I need to install. When I finished doing this I had 6 mb free. so far so good. Then I started installing cabs files from Ext Rom copy on harddisk, with cabinst. These were smart dial cab, O2 connect and a few other (which I thought necessary) cab files. These too I installed into storage memory. If my memory serves me right, I started experiencing a sudden slide down in memory after this. Before this I had around 25 mb memory free. Then suddenly the slide down in memory. In fact Resco today plug in shows me the dramatic slidedown as if the memory is getting sucked down a black hole.
I will do a hard reset as suggested by you and then load my software into storage memory. This time I will not install cab files from Ext Rom. Is that OK ?
Your O2 software is def. causing your probs. If you need some apps from it, try WinCECabManager. With it you can see which files are stored where on your device. After cab installation you can move them to eg. \Storage\Windows & change all links & reg keys referring to those files. Or change tea cab-file of course. It can take some time, but ves a huge amount of RAM.
M
Thanks ! I will try your suggestion. Have never used WINceCab Manager. Hope it is not too technical.
Not for me, it's a bit like explorer. But then again I'm not standard.
Some good news !
Like I said, I had around 24 mb free memory after the big storage hack (after installing all applications, whether in storage memory or storage card).
The good news is that all my FREE MEMORY has come back. Don't know really how it happened. I was using my blue tooth device which I switched thru the icon on the screen bottom right.
In error I touched the icon to rotate screen orientation. When I finally got my orientation correctly, I also got all my lost memory.
IMAGINE THAT !
Thanks for all your quick responses and great help you gave me. I will surely emulate you helping ways.
oltp said:
Hi all,
- Want a WWE BIG Storage rom the easy way? Follow http://wiki.xda-developers.com/index.php?pagename=MagicianRomUpgrade and download ftp://xda:[email protected]_NK.nbf/BIG_Storage_nk_for_rom_1.13WWE.zip This NK.nbf is patched for BIG Storage, you only need to put it in the directory with the extracted shipped-rom.
But remember that when this topic is still visible in the first page of this board I will probably stop answering new threads about BIG Storage and rom upgrading questions, I've done that for 5 months now and I'm starting to loose my interest.
Regards, M
.
Click to expand...
Click to collapse
Dear OLTP, I am not able to find the patched nk.nbf on the ftp. Kindly check it is not there.
When I use nbfdec.exe for decoding the NK.nbf it gives me crc error and the decoding fails. whereas with the same set of NK.nbf,ms.nbf and radio.nbf I have success fully upgraded my magician to WWE1.13 with radio1.13 Kindly help

Full ROM vs Min ROM + Cabs

I am new to the WM platform, and have been flashing my Tilt like crazy. I am trying to decide if it is better to go with a minimal ROM and install the addon's via CABS that I want, or if it is better to get a ROM like DUTTY's that has 98% of what I use already installed.
Coming from the Palm world, there were advantages of moving apps into the ROM as it would free the space for storage. A typical application install would use the storage space for both application and data.
Is this true with Kaiser/Tilt and WM? Is the 256Mb of ROM used only by applications that are either 'flashed' or loaded via the ExtendedRom Unlock and 128Mb of RAM used by cab file installs, and other installations?
Finally, when installing an application on the MicroSD card, does it first have to copy to the phones ram and then run, or is the memory directly accessed?
Thanks!
I like em lite
If you are going to use all the HTC software in Dutty's then I say to load his ROM. They are very good. I'm a fan of a lite ROM and use XDA-live since I choose to not use any HTC software.
ROM Goes Unused?
So does the extra space of your ROM go unused by any applications? Say you install a lite, + quick menu, PocketCM, and a few other goodies that are included in a fuller ROM..is that now taking up space where you would put ringtones, themes, data files, etc. in your RAM.
I guess my question is more like this:
Is the ROM/RAM issue similar to palm, or can I think of the ROM as a PC hard drive, and the RAM just that..used by what is running only.
I don't believe the ROM is just a like a pc hard drive since I have to flash to get stuff in there, but I wasn't sure if that was just certain portions of the ROM where the OS lives.
redbaron73 said:
I don't believe the ROM is just a like a pc hard drive since I have to flash to get stuff in there, but I wasn't sure if that was just certain portions of the ROM where the OS lives.
Click to expand...
Click to collapse
You can say that ROM is like PC's hard drive. A space of this ROM is reserved from the OS and the rest is free for the user.
When you flash with a lite ROM the space reserved for the OS is smaller and the opposite when you flash with a full version.
athanaso77 said:
You can say that ROM is like PC's hard drive. A space of this ROM is reserved from the OS and the rest is free for the user.
When you flash with a lite ROM the space reserved for the OS is smaller and the opposite when you flash with a full version.
Click to expand...
Click to collapse
So I assume that when looking at the memory tool, this unreserved portion of this ROM is listed as "Storage" and the Memory/RAM is listed as "Program"
This clears it up for me.
Thank You!!

Help: Ext Rom

Need help guys! How can i delete the files contained in my phone's storage or ext rom? I tried deleting the files but as soon as I soft reset my device, all of the files keep coming back... It really drains my battery big time and I want to get rid of it. How can I permanently delete the files contained in my phone's storage? Hope someone could help me here, thank you in advance!
Sukir420,
Not quite understand the question. Sorry, but you are referring to too many things without much details.. ExtROM, files in it and 'Storage' are two different things , The files in ExtROM are used by the device to install additional applications which are there in it, when you Hard Reset your device, and otherwise they just lie there eating that space.
It would help if you post more details about your device and current versions of Radio/ROM/ExtROM and whether your device is SupeCID unlocked etc.,
Anyway, act any of the below at your own risk.
a) If you would like to delete files in ExtROM first unlock (search this forum to get the extrom unlocker) it and make it visible then use a tool like TC (type /Extended_Rom folder) or Resco Explorer and delete filesfrom it. Alternatively you can pick up one of the empty ext ROMs floating around and flash that then unlock it to use that space as storage.
b) Do not understand or comment on whether files in ExtROM could significantly impact the battery drain!! , to my knowledge files in ExtROM may not impact battery too much.
rbalu72 said:
Sukir420,
Not quite understand the question. Sorry, but you are referring to too many things without much details.. ExtROM, files in it and 'Storage' are two different things , The files in ExtROM are used by the device to install additional applications which are there in it, when you Hard Reset your device, and otherwise they just lie there eating that space.
It would help if you post more details about your device and current versions of Radio/ROM/ExtROM and whether your device is SupeCID unlocked etc.,
Anyway, act any of the below at your own risk.
a) If you would like to delete files in ExtROM first unlock (search this forum to get the extrom unlocker) it and make it visible then use a tool like TC (type /Extended_Rom folder) or Resco Explorer and delete filesfrom it. Alternatively you can pick up one of the empty ext ROMs floating around and flash that then unlock it to use that space as storage.
b) Do not understand or comment on whether files in ExtROM could significantly impact the battery drain!! , to my knowledge files in ExtROM may not impact battery too much.
Click to expand...
Click to collapse
Oh, okay sorry for that. I am then referring to Ext Rom. Yes, sir I would like to flash an empty ext ROM for my uni but I can't seem to find one. If you could please help me with this I would definitely appreciate it Sir. The files located in my ext Rom has an autorun file with it and again, sorry for implying that about my uni's battery getting burned too quick.
My Uni is superCID unlocked and I am using Tomal's WM6.1 Rom right now. I had this problem since I flashed my Uni with the "WM5 faster than WM6 ROM" for its video calling feature but I was too hooked to WM6 that's why I flashed back to Tomal's.
So, if anybody can help me with an empty ext rom to flash, I would really appreciate it.
Thanks guys!
Here you go
You can find Empty Ext Rom here
Surprised to note taht when you are on Tomal wm 6.1 (hopefully 8.2) you should not have ext rom as is unless it is 'NOT UNLOCKED'.
Tomal's Rom makes the ExtRom as 'Storage' which is visible and uable for storing files.
Ensure that your Extended Rom is unlocked and Visible before flashing this empty one. Other alternative is, use the unlocker tool and reflash your current Tomal version, if you can manage to reinstall the applications you got post Hard Reset as that would for sure make ExtRom as 'Storage'.
Attached is a working Ext Rom unlocker(at least it worked for me)
All the best !
The link for the empty extension rom states "Page not found", if you could please provide a mirror for this file, thank you very much sir for your big help.
Uploaded the ms_.nbf file which is Ext Rom for you to rapidshare.. Hope this helps
http://rapidshare.com/files/147183731/ms_.zip.html

Are mobile network's settings retained after flashing a custom ROM?

As a tentative newcomer to the world of flashing ROMs, I've searched the forums but not found clarification on the following:
If I was to flash a cooked ROM onto a Windows Mobile device (say a Touch HD on the UK T-Mobile network), would the phone still have access to the settings/configuration it needs in order to access the T-Mobile network for data, SMS, etc without any further work or reconfiguration required on my part?
If so, where are those settings held such that they are unaffected by flashing?
If not, would I need to locate and back up the necessary settings prior to flashing? How is this generally done to ensure that no settings are missed?
Thanks in advance to those taking the time to reply.
most new roms have the major networks info built in.. so it should set your network up automatically both for SMS and phone usage.. about data connections.. I don't think it would be set up automatically unless the rom is already setup for a specific network.
Everything is affected by flashing. all your data and configuration will be erased thus you will have to setup the data connection again.
you can backup your data prior to flashing
you can find a backing up guide in my signature under the GUIDES thread
I see - thanks. I've noticed a few mentions of ExtROM - is this the part of the ROM where such settings are stored?
Also, when using a device such as the Touch HD which (unless I am mistaken) has no onboard storage, when a user installs a new program onto the device, where are the new files (DLLs etc) actually installed to? And where is the registry held so that it can be updated during installation (or when editing manually)?
If I understand correctly, the installed ROM cannot be changed unless you replace it completely by flashing. So if the ROM contains the operating system (including the registry) then how is it possible to edit this?
clockworktangerine said:
I see - thanks. I've noticed a few mentions of ExtROM - is this the part of the ROM where such settings are stored?
Also, when using a device such as the Touch HD which (unless I am mistaken) has no onboard storage, when a user installs a new program onto the device, where are the new files (DLLs etc) actually installed to? And where is the registry held so that it can be updated during installation (or when editing manually)?
If I understand correctly, the installed ROM cannot be changed unless you replace it completely by flashing. So if the ROM contains the operating system (including the registry) then how is it possible to edit this?
Click to expand...
Click to collapse
The Touch HD actually has 512 MB of ROM memory (on-board memory)...
As far as the ExtRom, this is a part of memory that most device carriers use to put their "junk" in. These are normally either hidden, or otherwise not accessible by normal means. Anyways, the settings (as nir36 pointed out) are in the ROM itself, so whether you have an Extrom or not is irrelevant as far as network settings.
Just to put it in simple terms, flashing a device means completely wiping out everything you have in there... kinda like formatting a hard-drive. The only thing that is left is the bootloader, which is not located in the rom memory, so this doesn't get wiped out with an OS flash.
Lastly, the registry is part of the OS. Therefore, when you wipe out your OS by flashing, the registry goes bye bye as well...
Hope this helps some...
egzthunder1 said:
The Touch HD actually has 512 MB of ROM memory (on-board memory)...
As far as the ExtRom, this is a part of memory that most device carriers use to put their "junk" in. These are normally either hidden, or otherwise not accessible by normal means. Anyways, the settings (as nir36 pointed out) are in the ROM itself, so whether you have an Extrom or not is irrelevant as far as network settings.
Just to put it in simple terms, flashing a device means completely wiping out everything you have in there... kinda like formatting a hard-drive. The only thing that is left is the bootloader, which is not located in the rom memory, so this doesn't get wiped out with an OS flash.
Lastly, the registry is part of the OS. Therefore, when you wipe out your OS by flashing, the registry goes bye bye as well...
Hope this helps some...
Click to expand...
Click to collapse
Thanks for this reply
I understand that the ROM is on-board memory and that a flash replaces all of it, including the OS.
What I don't understand is how registry edit tools (e.g. Resco) work. Since the registry is part of the OS and resides in the ROM, how can the registry be edited, i.e. written to, so that the changes are still there even when the phone is turned off and back on?
(I am presuming that the registry editing tools don't do any kind of flash operation.)
ok, first of all, registry settings are not saved on the ROM but on the internal storage.
the ROM files CAN be replaced but only "apparently" not "really".. that is, when you flash a rom, the files from the rom will stay on the device whether you replace them or not.. but if you copy over them, the device will read from the new files WHILE still keeping the other rom files (since they can not be deleted).
the touch HD has 512megs of ROM memory and 256megs of RAM memory..
nir36 said:
ok, first of all, registry settings are not saved on the ROM but on the internal storage.
the ROM files CAN be replaced but only "apparently" not "really".. that is, when you flash a rom, the files from the rom will stay on the device whether you replace them or not.. but if you copy over them, the device will read from the new files WHILE still keeping the other rom files (since they can not be deleted).
the touch HD has 512megs of ROM memory and 256megs of RAM memory..
Click to expand...
Click to collapse
Alright I'm getting closer to fully understanding! Here's a couple of statements and follow-up questions, please correct me where I'm wrong.
Statement:
So when copying over a file that is in the ROM, the original file remains in the ROM but the system somehow knows to read from the replacement file, which is held elsewhere on the device.
Question:
How does it know when a ROM file has been replaced, and where to look for the replacement file?
Statement:
If the replacement file is installed to the device, but cannot itself be in the ROM, then presumably it must be in the RAM. If so, then I would expect that turning the phone off or removing the battery would clear the RAM, causing the replacement file to be lost, effectively resetting the changes.
Question:
Is this the case or is there some internal battery which keeps the RAM alive, and only an explicit hard reset can clear the RAM?
Please can anyone help with my follow up questions?
Thanks
1. yeah.. it stays.. dunno how the reading is done tho
2. when a rom is replaced all those files which you replaced are erased. flashing a rom is like performing a format, nothing is kept and the OS is reinstalled.
3. flash memory is not like computer ram.. it uses capacitors to reserve data.. and it takes years before it is erased
Ah so it's Flash memory, right!
So the internal Flash memory is used both as a RAM workspace and for storage space for stuff installed to the device...apps etc.
Thanks Nir!

App Jargon

I've noticed as jargon changes some of the less adept to the inner workings of their phone may need a reference for these terms. Maybe the Mod already has a reference page but the search did not produce it. Anyway, maybe if everyone adds their terms here Ill collate and repost so it will make it easier for the MOD and XDA. Below is a previous post with some additional added to it.....
Terminology:
Manila: The standard HTC interface with the big digital clock and tabs. The HD2 comes with Manila 2.5 (= HTC Sense)
ROM: Read Only Memory, but for our purposes usually means the operating system itself, which can be written to the ROM of the device. Originally rom had a piece of black plastic over a small window in the center of the rom chip. You would "peel back the tape and flash a light on it. This would erase the rom and you could update it by reprogramming the room... ERGO "Flashing the ROM". Now this is done through software only and cooked ROMs are customed Flashed roms...same thing.
Radio: Usually refers to the part of the OS controlling radio functions, which are the phone signal receiver, Bluetooth and WiFi. This also contains the GPS drivers.
Cooked: A ROM that has been modified by a ROM 'chef' to make it either more up to date, more functional, or to give more available memory. Some better than others, and all technically void your warranty.
Bricked: A 'cooked' ROM needs to have the boot sectors of the device modified to allow the ROM to be installed. If this hasn't been done, the the device can get stuck in the middle of the update, hence the term 'bricked': it becomes basically an unusable brick. There can be ways out of it, but sometimes it's terminal.
Flash: The process of updating the physical ROM with a new ROM OS image
SSPL/HSPL/SPL: The SPL is like the BIOS of a PC. Stock SPLs don't allow updates other than from the manufacturer or the phone operator. SSPL (SoftSPL) is a temporary software fix that allows the ROM to be updated and HSPL (HardSPL) is a permanent fix that protects from bad ROM flashes.
RRU/NBH: RUU stands for ROM Update Utility and it is the PC executed process to update a ROM. It has a few steps such as checking versions, battery status then putting the device into a mode to allow the ROM update (Bootloader mode) then doing the actual update. The NBH file is the actual ROM file itself that overwrites the ROM. It is possible to copy the NBH file to a storage card and rename it, then do the update without connecting to a PC.
RAM. Random access memory. This is usually refers to the temp ram in the phone. BTW the flash drive or SD card essentially is a ram chip that has some additional features to allow longer time storage of information... so when you remove power from it is still keeps the information intact on the SD card.
Add more as there is much more jargon out there. Thanks

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