[Q] Noob? Convert from gsm to cdma - AT&T Samsung Galaxy Note I717

Is there a ROM that will make my gsm sgh-1717 from at&t work on Verizon CDMA network?

Sorry there isn't. That would require a hardware change and I don't think parts are available to do so.

Roms don't enable that - modems do that. GSM and CDMA are two different types of networks. Thats why ^^^^ said you need to have different hardware, but you can't change the modem chip on the mainboard.

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[Q] Difference Between CDMA and GSM Handset?

Is there someone kindly explain me what is the different between GSM and CDMA Handset?
I do know what is the different between GSM and CDMA Network.
What I would like to know is about Handset. Is it different in Hardware or different in Software (ROM, Kernel, Firmware, Modem)?
In Myanmar, the major network is CDMA 800 and using CDMA Sim Card. But there are very limited handset available to be used with CDMA.
If the difference is only for Software, then it might be able to build Software for most popular Android phone (i.e - Galaxy SII etc) so that people will have more choice on handset.
if the difference is the Hardware, then there is no choice and have to buy only the available handset.
Appreciate, if some Android Guru could shed a some light on here.
It is hardware. The antenna are built differently depending on the type of network it is connecting to.
zelendel said:
It is hardware. The antenna are built differently depending on the type of network it is connecting to.
Click to expand...
Click to collapse
Thanks for the quick answer.
If so, then there would have no choice.
No problem.
Question answered thread closed

[Q] Evo 3D CDMA to GSM is it possible???

Hi
Is it possible to use CDMA version of EVO 3D with GSM band??? I know that there is no SIM card slot on board but except this PCB looks very similar.
Of cource firmware is different aswell, but I saw on forum that someone use ROM from CDMA version on GSM model even without changing H-boot, so porting from GSM to CDMA should work aswell??
And last thing if I will flash radio from GSM into CDMA I will permanently brick my phone or I will be able to repair it with bootloader??
Thanks for replay....
Erm... Quite simply... No. Too risky as software / hardware differences will leave you with an irrecoverable brick.
There are no drivers for GSM to CDMA bands etc.
People do change their bands with Custom Roms but im pretty sure that it isn't easy at all.
Invest in a GSM version. They have dropped severely in price.

[Q] CDMA unlock simlock

Can you remove the Simlock from a CDMA Evo 3d so that it will be able to use any carrier? Telus or rogers etc... I have tried searching the forums and Google (that was a joke all of the results I could find were commercials for paying someone else to do it for you. I want to do it myself. If possible.
I do not believe you can flash your network over to a sim based network like rodgers due to the fact that cdma phones do not have the hardware integrated inside the phone to run gsm networks or sim based. Your best bet is to flash to another network like boost, virgin mobile, page plus or metro pcs. However any type of esn or meid cloning is illegal and is frowned upon when asking for help on xda. Asking for help will get into trouble here so google will have to hold your hand as you search it's massive data bases to find the method of flashing networks.
Jsparta26 said:
I do not believe you can flash your network over to a sim based network like rodgers due to the fact that cdma phones do not have the hardware integrated inside the phone to run gsm networks or sim based. Your best bet is to flash to another network like boost, virgin mobile, page plus or metro pcs. However any type of esn or meid cloning is illegal and is frowned upon when asking for help on xda. Asking for help will get into trouble here so google will have to hold your hand as you search it's massive data bases to find the method of flashing networks.
Click to expand...
Click to collapse
AFAIK, MSM8660 (which is inside CDMA 3D) can do both CDMA and GSM unlike MSM8260 (which is inside GSM 3D).... But I believe it's not possible to use GSM service on it, since it does not have a sim slot and a OS to support it. If Rogers have CDMA service too, then it should be possible.
Thanks for that little piece of info sir.
mnomaanw said:
AFAIK, MSM8660 (which is inside CDMA 3D) can do both CDMA and GSM unlike MSM8260 (which is inside GSM 3D).... But I believe it's not possible to use GSM service on it, since it does not have a sim slot and a OS to support it. If Rogers have CDMA service too, then it should be possible.
Click to expand...
Click to collapse
Correct, there is no SIM on the CDMA version. I read about someone a while ago that was able to hack the radio and get GSM to show up, but without a SIM card it is useless. If you could solder a SIM reader on and then hack the radio (which are extremely difficult) you may be able to do it, but it would not be worth it.
Get this ---> http://www.skyroam.com/index.php?option=com_content&view=article&id=44&Itemid=67
Should work with EVO 3D
You will have Sprint + Rogers/Any GSM carrier

[Q]Why Droid DNA can't use other CDMA network ?

Sorry for asking stupid question....
I did some research, but I still can't figure out why DNA can't uses other CDMA network.
Is it the problem if radio???
According what I see, DNA is able to unlock bootloader, s-off, root.
What stuff should I waiting for? Radio?
Your answer will help me know what kind of threads I should pay attention to. Thanks a LOT in advanced!
BTW, I am planning use DNA in Taiwan with a CDMA network provider.
I had checked the hardware is fitted to my network (CDMA2000 800Mhz). Thanks for all concerned!
siekaiser said:
Sorry for asking stupid question....
I did some research, but I still can't figure out why DNA can't uses other CDMA network.
Is it the problem if radio???
According what I see, DNA is able to unlock bootloader, s-off, root.
What stuff should I waiting for? Radio?
Your answer will help me know what kind of threads I should pay attention to. Thanks a LOT in advanced!
BTW, I am planning use DNA in Taiwan with a CDMA network provider.
I had checked the hardware is fitted to my network (CDMA2000 800Mhz). Thanks for all concerned!
Click to expand...
Click to collapse
Hi,
First of all, you must understand that GSM & CDMA are dissimilar technologies, whereas with GSM you can easily swap between carriers so long as they have the same/supported radio frequencies and your phone is sim-unlocked, this is not possible with CDMA. CDMA devices do not use a sim card to retain your account information or activation abilities. When it comes to CDMA (from my understanding) the ESN is key, the ESN must be added to your networks (for lack of a better term at the moment) ESN database. In the United States, most CDMA carriers will not add ESN's of other carriers phones to their network, your results may be different, because of your location. If your carrier were to allow or be willing to add the ESN of the DNA you obtain to their database than there is a possibility that it may work. (I am unsure if that can just be done or if it would have to be removed from Verizon's network & so forth, because I've never personally had to do such a thing)
There is a second problem though, the LTE radio / sim card interface. Because of the way these phones work on Verizon with LTE, I am unsure if you could even activate it, because it looks like the LTE sim is needed to authenticate your account to the carrier like a regular GSM phone. I have no idea how you would activate this phone without LTE / GSM on your carrier, even with the CDMA ESN added. It seems like it would be a double edged sword, but I could be wrong in this respect.
Also at this current time, this phone has root, and an unlocked bootloader through HTCDev, but is still **S-ON**.
Though none of those things have to do with you being able to use this phone on your carrier.
If your carrier was GSM I would say go for it because this is a GSM Global phone as well, but because its CDMA that you need I really incredibly doubt you'll be able to use this phone, but I may be wrong, but until someone else states otherwise I would look for a different phone.
Hope this Helps!
I am also interested in it. How can we check it out? I should go to my CDMA carrier and ask to activate my ESN?
Where can i find ESN? In Settings-About there is only MEID, IMEI, Phone serial number and IMSIAdded
I work for a CDMA carrier in the USA and with lte on the phones now, they truly act as gsm phones. If your CDMA carrier has lte then they can give you a sim and it will activate your DNA. However, if they only operate on 2g/3g then the post above me is correct with the ESN database and will USUALLY not activate the phone (in store sales reps usually don't even have the ability). Even if they have lte, activating another carrier's phone is not in the best interest of the sales Rep and they usually won't.
YMMV
Sent with my DNA
kyleco said:
I work for a CDMA carrier in the USA and with lte on the phones now, they truly act as gsm phones. If your CDMA carrier has lte then they can give you a sim and it will activate your DNA. However, if they only operate on 2g/3g then the post above me is correct with the ESN database and will USUALLY not activate the phone (in store sales reps usually don't even have the ability). Even if they have lte, activating another carrier's phone is not in the best interest of the sales Rep and they usually won't.
YMMV
Sent with my DNA
Click to expand...
Click to collapse
I should mentions that we don't have LTE in Taiwan so far.
My carrier provides CDMA2000 1xEV-DO rev.B (I guess it is)
Is it operate as LTE OR 2G/3G you mentioned?
siekaiser said:
I should mentions that we don't have LTE in Taiwan so far.
My carrier provides CDMA2000 1xEV-DO rev.B (I guess it is)
Is it operate as LTE OR 2G/3G you mentioned?
Click to expand...
Click to collapse
From my experience, they will not be able to activate it if they do not have lte, as they would need to have a settings file made for that phone to get it to work on their network. Nevers hurts to call and ask though.
Sent from my HTC6435LVW using xda premium
Hi,i am from Austria,i have a Droid Dna by Verizon and the Phone works fine here in Austria, 2G and 3G/HSDPA

[Q] Have a tmob s4 version thinking of moving to Verizon

Long story short my work has offered me cell phone service but they only have Verizon or ATT.
I have a tmob s4 ... rooted and custom rom. Are the phones "essentially" the same so with a kernel and modem would I be good on Verizon?
Any caveats to be concerned with? its been probably 8 years since I had a Verizon plan but it does offer better coverage than ATT in the places I need...
thansks!
Razzzzer said:
Long story short my work has offered me cell phone service but they only have Verizon or ATT.
I have a tmob s4 ... rooted and custom rom. Are the phones "essentially" the same so with a kernel and modem would I be good on Verizon?
Any caveats to be concerned with? its been probably 8 years since I had a Verizon plan but it does offer better coverage than ATT in the places I need...
thansks!
Click to expand...
Click to collapse
Only the Verizon S4 will work with Verizon, you'll need to go to ATT.
Oishikatta said:
Only the Verizon S4 will work with Verizon, you'll need to go to ATT.
Click to expand...
Click to collapse
I see others that have used the Verizon s4 on Tmob so not sure why the reverse wouldn't be true... ill research more but I am finding that all the s4 hardware is the same... only software differences.. (possible that its not possible to get the Verizon software on the phone the hardware should be the same)...
maybe get some more input
Razzzzer said:
I see others that have used the Verizon s4 on Tmob so not sure why the reverse wouldn't be true... ill research more but I am finding that all the s4 hardware is the same... only software differences.. (possible that its not possible to get the Verizon software on the phone the hardware should be the same)...
maybe get some more input
Click to expand...
Click to collapse
I don't know where you're researching, but the S4 definitely has hardware differences.
Verizon is what's called a "CDMA" carrier. Their S4 includes hardware that can connect to both their CDMA and others' GSM networks.
T-Mobile has a GSM network. Their S4 includes only the GSM hardware, there is no possibility of using it with a CDMA carrier.
Most variations of the S4 also have slightly different sets of "bands" that they can connect to, so the speed you get will vary depending on both the network type and your S4's type. However, the S4 should be able to get at least 2G on any GSM network. Verizon's S4 has the widest possible area of use, because it includes both CDMA and GSM. It can be used on T-Mobile or ATT, but their S4s cannot be used on Verizon entirely because of the hardware differences.
Oishikatta said:
I don't know where you're researching, but the S4 definitely has hardware differences.
Verizon is what's called a "CDMA" carrier. Their S4 includes hardware that can connect to both their CDMA and others' GSM networks.
T-Mobile has a GSM network. Their S4 includes only the GSM hardware, there is no possibility of using it with a CDMA carrier.
Most variations of the S4 also have slightly different sets of "bands" that they can connect to, so the speed you get will vary depending on both the network type and your S4's type. However, the S4 should be able to get at least 2G on any GSM network. Verizon's S4 has the widest possible area of use, because it includes both CDMA and GSM. It can be used on T-Mobile or ATT, but their S4s cannot be used on Verizon entirely because of the hardware differences.
Click to expand...
Click to collapse
I understand the networks are different.. what I am seeing is that the hardware is the same ... they all have the same chips.. the different carriers are just using software to use what they need
for example here:
http://forum.xda-developers.com/showpost.php?p=25953096&postcount=13
and this thread has examples of people who have used their Verizon on Tmob (voice, wifi, and 4g)
http://forum.xda-developers.com/showthread.php?t=2331131
long story short they say all the phones are the same... they just use different Radio software (plus kernel I assume)
The answer is simple: You will never use a T-Mobile S4 on Verizon.
Verizon S4 on T-Mobile is completely irrelevant, because they're designed to work that way.
Razzzzer said:
I understand the networks are different.. what I am seeing is that the hardware is the same ... they all have the same chips.. the different carriers are just using software to use what they need
for example here:
http://forum.xda-developers.com/showpost.php?p=25953096&postcount=13
and this thread has examples of people who have used their Verizon on Tmob (voice, wifi, and 4g)
http://forum.xda-developers.com/showthread.php?t=2331131
long story short they say all the phones are the same... they just use different Radio software (plus kernel I assume)
Click to expand...
Click to collapse
There is NO CDMA radio in a T-Mobile GS4.
Even if it were, Verizon will not add foreign IMEID/ESN to their database. Without the IMEID/ESN added to the database you cannot get voice service. You could possibly take a provisioned SIM and get data only, but what good is that.
Sell the S4, buy an HTC M8 do S-Off, move on.
Your S4 will never work on Verizon.

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