Develop Bugs

Dual Radios, CDMA and GSM?

Will this phone have dual CDMA and GSM support?
I've read it will. Click the link below.
http://www.phonenews.com/sprint-htc-touch-pro2-images-surface-7908/
If so, I wonder if we purchased a Sprint one, could we unlock it and use it on a GSM Carrier like AT&T. This is a hypothetical question.
If it supports GSM, does this mean it would HAVE to support SIM cards?

rmk1825 said:
Will this phone have dual CDMA and GSM support?
I've read it will. Click the link below.
http://www.phonenews.com/sprint-htc-touch-pro2-images-surface-7908/
If so, I wonder if we purchased a Sprint one, could we unlock it and use it on a GSM Carrier like AT&T. This is a hypothetical question.
If it supports GSM, does this mean it would HAVE to support SIM cards?
Click to expand...
Click to collapse
No, because the GSM radio only supports international frequencies (not 1900). The purpose is for you to roam or use GSM networks overseas not in the U.S.
Example, i want to go visit my sister in the U.K. I land at Heathrow, buy a prepaid SIM from say O2 and pop it in the TP2. If i'm back in the States, i use Sprint's CDMA network.

[Q] ATT Version Usable with T-Mobile?

I am going to switch to T-Mobile in 2 months so was wondering if it will work with T-Mobile's HSPA + Network.

AFAIK It won't, but the frequenceies are listed on both carrier's sites so you can have a look at that.

No.
http://www.androidpolice.com/2011/0...nt-4g-hspa-phone-will-not-be-covered-by-both/

Couldn't we just flash the t-mobile radio like with the t-mobile sgs2 and the skyrocket from at&t?

It should be possible. Check out the specs of the two: http://www.gsmarena.com/compare.php3?idPhone1=4804&idPhone2=4803
This is EXACTLY the same as Tmobile S2 and ATT S2 LTE: http://www.gsmarena.com/compare.php3?idPhone1=4129&idPhone2=4303
Some awesome dev needs to do some radio hacking to make the two phones interchangeable as they did for the S2/S2 LTE.

pvc_ said:
No.
http://www.androidpolice.com/2011/0...nt-4g-hspa-phone-will-not-be-covered-by-both/
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that article is over a year old. there are many devices that work on both carriers via 4g. looking at the frequencies on att version it should work with a radio flash.

There's hope then

http://news.cnet.com/8301-1035_3-57460125-94/t-mobiles-pricier-samsung-galaxy-s3-will-not-get-lte/
same hardware in all US S3's so theoretically even a sprint or verizon one can be flashed if its just going to be software limitations

tspx23 said:
http://news.cnet.com/8301-1035_3-57460125-94/t-mobiles-pricier-samsung-galaxy-s3-will-not-get-lte/
same hardware in all US S3's so theoretically even a sprint or verizon one can be flashed if its just going to be software limitations
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Click to collapse
The CDMA and TDMA versions are different and not compatible. A sprint or Verizon model will not work on GSM networks due to the different protocols used. AFAIK no phone is universally portable amongst US carriers.

Verizon/Sprint/US Cellular phones are 100% different in terms of radio hardware and software.
It is possible the T-Mobile/AT&T ones will likely work together, but why? Also something to consider is the AT&T Note on T-Mobile gets HORRIBLE battery life.

malaeum said:
The CDMA and TDMA versions are different and not compatible. A sprint or Verizon model will not work on GSM networks due to the different protocols used. AFAIK no phone is universally portable amongst US carriers.
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Click to collapse
You sure about this? Verizon model will have a sim card and has GSM support. Verizon will probably block T-Mobile and ATT with all of their GSM/devices.

tspx23 said:
You sure about this? Verizon model will have a sim card and has GSM support. Verizon will probably block T-Mobile and ATT with all of their GSM/devices.
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The SIM card is for LTE. The only way to get 3G on a CDMA device would be through CDMA.

joshnichols189 said:
The SIM card is for LTE. The only way to get 3G on a CDMA device would be through CDMA.
Click to expand...
Click to collapse
Not exactly true... After a "hack" to my VZW Moto Bionic and dropping in an ATT sim from a demo Galaxy Note, we got working H+ on the Bionic.
Even after hack, the Bionic doesn't appear to support T-Mobile's 1700mhz so I get EDGE only when I use the T-Mo SIM out of my Galaxy S2.
But I wont have a Verizon Galaxy S3 to play with to see how that works.

KidJoe said:
Not exactly true... After a "hack" to my VZW Moto Bionic and dropping in an ATT sim from a demo Galaxy Note, we got working H+ on the Bionic.
Even after hack, the Bionic doesn't appear to support T-Mobile's 1700mhz so I get EDGE only when I use the T-Mo SIM out of my Galaxy S2.
But I wont have a Verizon Galaxy S3 to play with to see how that works.
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Interesting, have not heard of that one but I will take your word for it. Either way, most phones do not have AWS bands for T-Mobile unless they are T-Mobile phones.

Assuming the Verizon version has GSM 3G radios in it (what they call a "Global" phone) I don't see why even it could be flashed if someone could get the radio hacked.
For example, my current phone, the Droid 2 Global, normally runs on Verizon's CMDA bands. Being a global phone, it has GSM radios in it which can be activated if you get an unlock code from Verizon (not difficult).
Here's the catch- the baseband locks the phone so that it does not work on AT&T and T-Mobile's frequency bands! However, some clever hackers at TeamBlackHat were able to hack the baseband to allow it to work on US carriers as well.
tl;dr if the CDMA versions have GSM radios it should be feasible to make them work on AT&T and T-Mobile.

ExodusC said:
Assuming the Verizon version has GSM 3G radios in it (what they call a "Global" phone) I don't see why even it could be flashed if someone could get the radio hacked.
For example, my current phone, the Droid 2 Global, normally runs on Verizon's CMDA bands. Being a global phone, it has GSM radios in it which can be activated if you get an unlock code from Verizon (not difficult).
Here's the catch- the baseband locks the phone so that it does not work on AT&T and T-Mobile's frequency bands! However, some clever hackers at TeamBlackHat were able to hack the baseband to allow it to work on US carriers as well.
tl;dr if the CDMA versions have GSM radios it should be feasible to make them work on AT&T and T-Mobile.
Click to expand...
Click to collapse
So basically, all world phones can literally be made into world phones? Nice!

SaHiLzZ said:
It should be possible. Check out the specs of the two: gsmarena /compare.php3?idPhone1=4804&idPhone2=4803
This is EXACTLY the same as Tmobile S2 and ATT S2 LTE: gsmarena /compare.php3?idPhone1=4129&idPhone2=4303
Some awesome dev needs to do some radio hacking to make the two phones interchangeable as they did for the S2/S2 LTE.
Click to expand...
Click to collapse
You raise a really good point.
joshnichols189 said:
Verizon/Sprint/US Cellular phones are 100% different in terms of radio hardware and software.
It is possible the T-Mobile/AT&T ones will likely work together, but why? Also something to consider is the AT&T Note on T-Mobile gets HORRIBLE battery life.
Click to expand...
Click to collapse
Does the S2 and S2 LTE (skyrocket) succumb to bad battery life like the note does when their networks are interchanged?

[Q] Which one to get? Which version uses what bands?

My S3 mini broke. Now I thought to get an S4 mini, but I can't figure out which one would be the right one.
I am using a plan in the US, ultra mobile, which is on the T-mobile network I think. I also often use my cellphone
abroad with other sim cards. I've seen that there is a 16GB version available - SCH-I435 from Verizon.
I can't figure out what bands this phone uses.
http://en.wikipedia.org/wiki/Samsung_Galaxy_S4_Mini has no info on the bands.
http://www.samsung.com/us/mobile/cell-phones/SCH-I435ZKAVZW-specs says:
LTE: Bands 4/13 CDMA 1x/EVDO Rev A. 850/1900 MHz.
Are there any other 16GB versions? What about root/rom? Any significant differences? Which would you recommend?

Its more like do you want LTE or 3g support, any international unlocked version will support all bands
Afaik verizon its CDMA and dont use a sim card therefore can't switch sim

fburgos said:
Its more like do you want LTE or 3g support, any international unlocked version will support all bands
Afaik verizon its CDMA and dont use a sim card therefore can't switch sim
Click to expand...
Click to collapse
I see. That would be bad. So the verison one can not switch SIM? Which means it can't be used in europe?
This post implies that there is some kind of SIM on the SCH-I435. But I don't exactly understand what works and what doesn't.

ghostwheel said:
I see. That would be bad. So the verison one can not switch SIM? Which means it can't be used in europe?
This post implies that there is some kind of SIM on the SCH-I435. But I don't exactly understand what works and what doesn't.
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Well Im really not sureim not in the us, but I remember a friend had a Verizon phone and can't be enabled in my country because didn't have Sim slot and all carriers have Sim buy was months ago that could have changed

If the info is of any help, I have a GT-I9195 model (currently connected to Spark, NZ) that claims to have 16G of memory and, in this case at least, is unlocked. It takes a mini-SIM, but that's not unusual now days.
Given that most phones in NZ are sold unlocked and people expect to be able to swap SIMs from one phone to another as well as take their current phones to another network, I'm guessing it supports most bands.

Mike_NZ said:
If the info is of any help, I have a GT-I9195 model (currently connected to Spark, NZ) that claims to have 16G of memory and, in this case at least, is unlocked. It takes a mini-SIM, but that's not unusual now days.
Given that most phones in NZ are sold unlocked and people expect to be able to swap SIMs from one phone to another as well as take their current phones to another network, I'm guessing it supports most bands.
Click to expand...
Click to collapse
Thank you! I'll get that model then.

[Q] My phone is unlocked. What I need to do next?

Hello!
Sprint unlocked my Phone. After I insert SIM card from another Carrier, I've got a message "invalid SIM Card". It there somewhere some kind of FAQ or instruction, step by step preferred what I need to do next to make it work?
Thank you!

antila said:
Hello!
Sprint unlocked my Phone. After I insert SIM card from another Carrier, I've got a message "invalid SIM Card". It there somewhere some kind of FAQ or instruction, step by step preferred what I need to do next to make it work?
Thank you!
Click to expand...
Click to collapse
They unlocked it for international use.

Yes. I understand! But is this possible to make it work with the USA GSM carriers? If this is possible, can somebody help? Thank you!

antila said:
Yes. I understand! But is this possible to make it work with the USA GSM carriers? If this is possible, can somebody help? Thank you!
Click to expand...
Click to collapse
Not really. I had my note 3 from sorint running on tmobile. But i only had edge and slow service bad voice calling. This phones hardware bands and software bands arent really meant for it. I had to modify the carrier info in my phone to get on tmobile alone. But ince there sorint didnt work anymore. A domestic sim card unlock isnt as easy as with gsm. With gsm the carrier info is practically just in the sim card. But with sprint CDMA it in the phone. Right now sprint sims are just for the lte and spark network. Not the actual use of the phone. So youre kinda out of luck sorry.

Bobguy21 said:
Not really. I had my note 3 from sorint running on tmobile. But i only had edge and slow service bad voice calling. This phones hardware bands and software bands arent really meant for it. I had to modify the carrier info in my phone to get on tmobile alone. But ince there sorint didnt work anymore. A domestic sim card unlock isnt as easy as with gsm. With gsm the carrier info is practically just in the sim card. But with sprint CDMA it in the phone. Right now sprint sims are just for the lte and spark network. Not the actual use of the phone. So youre kinda out of luck sorry.
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It is strange. It can work with GSM international but have problems with domestic GSM

antila said:
It is strange. It can work with GSM international but have problems with domestic GSM
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Click to collapse
Ita bc the hardware is not made for it. The frequencies arent right. If you go to sprinta website the only phones they have that they can domestically unlock for any gsm are the iphones.

Recommended Rootable Verizon Phones?

Hello, I have been with Verizon the last few years and I'm in the market for a new phone. I see on SlickDeals that there is a deal for the Verizon Samsung S10/S10+, but after reading through some of the posts, it seems you can't root the Verizon S10/S10+.
Since I don't need the latest and greatest phone from Verizon, are there any 'older', new in-store models that can be rooted so that I can install a custom ROM, etc?
Thanks in advance!

Your best bet is to get another phone that's not Verizon branded and just activate it on Verizon. You'd be going back a few years to get a Verizon phone that's rootable.

Thank you for this information... a couple of things getting another phone that is not Verizon branded:
- Previously, one would need to make sure they get a 'CDMA' (vs GSM) phone, but is there any technology, etc I need to look for when trying to find a non-Verizon phone?
- I assume if I get a 'non' branded Verizon phone, that some of the Verizon specific features may not work, e.g. WiFi calling, etc?

gil_happy said:
Thank you for this information... a couple of things getting another phone that is not Verizon branded:
- Previously, one would need to make sure they get a 'CDMA' (vs GSM) phone, but is there any technology, etc I need to look for when trying to find a non-Verizon phone?
- I assume if I get a 'non' branded Verizon phone, that some of the Verizon specific features may not work, e.g. WiFi calling, etc?
Click to expand...
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I can only answer the 2nd part of your question. Once you activate it on a Vzw sim you can flash Vzw firmware and get all the same features

Cyclone Emperor said:
I can only answer the 2nd part of your question. Once you activate it on a Vzw sim you can flash Vzw firmware and get all the same features
Click to expand...
Click to collapse
Thanks for this... that makes sense. The only other things is regarding the Verizon frequency bands - I'm guessing some phones may not have or support all of the Verizon frequency bands.

gil_happy said:
Thanks for this... that makes sense. The only other things is regarding the Verizon frequency bands - I'm guessing some phones may not have or support all of the Verizon frequency bands.
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I have the international unlocked model of the s10+ U1 version on Verizon and yes maybe one or two LTE bands aren't supported but i get 82Mbps down and 12Mbps up depending on location