Question about CDMA/GSM technology! - General Questions and Answers

If I have a GSM (like AT&T) carrier and find a cheap CDMA (Like Verizon)phone like the XV6900 (not for real just saying) and it's unlocked. If I buy it will I be able to make calls and what not on the phone since it's unlocked? Their is a phone I'd like to purchase but not sure because is CDMA and unlocked. Thanks!

cdma only works on cdma networks
so if you pay for a contract on a cdma network you can use it

So their is no slot for a SIM card in it? I found a cheap Imagio in great condition but if i cant use it it's not worth it.

Well... is it possible or not?

froggylover1345 said:
Well... is it possible or not?
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There is a sim slot on some CDMA world phones, but not on the Imagio and it will not work on a GSM network.

Related

Unlocked HD2 on Verizon?

I'm assuming the unlocked hd2 doesn't work on Verizon, correct? The phone is only capable of broadcasting on GSM?
snakeyes37 said:
I'm assuming the unlocked hd2 doesn't work on Verizon, correct? The phone is only capable of broadcasting on GSM?
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You answer your own question...Verizon is CDMA like SPrint...HD2 is GSM only so put 2 n 2 together.
Yep GSM / Edge only, no 3G or cdma.
Damn, that means I'd have to switch to crappy AT$T. Oh Well...
snakeyes37 said:
Damn, that means I'd have to switch to crappy AT$T. Oh Well...
Click to expand...
Click to collapse
You would be much better off with tmobile prices, service, etc.! Unless you want an iphonie
Verizon wants to control everything. If you want flexibility, don't buy Verizon. They will never sell anything unlocked. If they did you might be able to use the phone on Sprint or Cricket.
Verizon could offer phones with a SIM like card. The technology exists for SIM type cards which would work with CDMA phones.
However, CDMA sucks royally. Using 3G,the CDMA phones seem to drain batteries much faster than their GSM counterparts.
Verizon has such great and reliable voice and data but their data seems to have more latency and run much slower in tests.
Also, with most CDMA products, you cannot talk and surf the web at the same time.
The bottom line is that CDMA technology sucks. Go GSM.

Web Surfing while Talking

I know this is an odd request, but is there anyway to use the internet while talking on the phone. Normally I wouldn't care but I'm tired of the iPhone goons hassling me about it since those new commercials.
If not would there be a way if I unlocked my phone for GSM so I could talk on one frequency and surf on another?
Please direct me to a link if this has already been answered, I searched and didn't find anything.
Whoo boy, the old GSM vs. CDMA debate. No to your first question; it's a technology limitation of CDMA, which is why AT&T loves flaunting that fact. GSM also has the leg up in the number of simultaneous connections for conference calling. If you're looking for ammunition, CDMA generally enjoys better penetration of structures, and I know that I have found my service on Sprint to be stronger and much more reliable than my old plan with AT&T. Some people would even say that CDMA offers better call quality than GSM, but that's a huge debate with opinions on both sides. Also, GSM's encryption method was cracked recently, making calls potentially more vulnerable to eavesdropping. Finally, even when I had my old Tilt on AT&T I don't think I did too much surfing while talking on the phone; I really don't think it's as amazing a feature as they make it out to be.
For your second question, the CDMA Worldphone edition Touch Pro 2 used by Verizon and Sprint does have a GSM radio, but the question has been asked before if both networks can be used simultaneously and I believe the answer is always no. Anyone else feel free to correct me if I'm wrong.
last I checked in order to use cdma/gsm phone networks at the same time can't you just pop in a sim card!!!!!
trogdor1138 said:
Whoo boy, the old GSM vs. CDMA debate. No to your first question; it's a technology limitation of CDMA, which is why AT&T loves flaunting that fact. GSM also has the leg up in the number of simultaneous connections for conference calling. If you're looking for ammunition, CDMA generally enjoys better penetration of structures, and I know that I have found my service on Sprint to be stronger and much more reliable than my old plan with AT&T. Some people would even say that CDMA offers better call quality than GSM, but that's a huge debate with opinions on both sides. Also, GSM's encryption method was cracked recently, making calls potentially more vulnerable to eavesdropping. Finally, even when I had my old Tilt on AT&T I don't think I did too much surfing while talking on the phone; I really don't think it's as amazing a feature as they make it out to be.
For your second question, the CDMA Worldphone edition Touch Pro 2 used by Verizon and Sprint does have a GSM radio, but the question has been asked before if both networks can be used simultaneously and I believe the answer is always no. Anyone else feel free to correct me if I'm wrong.
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Click to collapse
one word IMPOSSIBLE!!!!!!!!!! GSM and CDMA are hardware radios an unlock is IMPOSSIBLE unless the phone is a world phone with both CDMA and GSM but your phone doesn't qualify so try getting a GSM/CDMA hybrid and then come back to me. However verizon will upgrade to LTE which is GSM based!!!!!!!! watch em LTE will allow voice and data at the same time. When LTE upgrade is complete say goodbye and good riddance to CDMA it will be shut down soon!!!!!
KW TP said:
I know this is an odd request, but is there anyway to use the internet while talking on the phone. Normally I wouldn't care but I'm tired of the iPhone goons hassling me about it since those new commercials.
If not would there be a way if I unlocked my phone for GSM so I could talk on one frequency and surf on another?
Please direct me to a link if this has already been answered, I searched and didn't find anything.
Click to expand...
Click to collapse
qjsmartphone - I thought that the TP2 was a world phone and thus held both antennas for cdma and gsm?
trogdor1138 -thanks for the input.
now I'm with sprint, and they offer 4G. This may be an ignorant comment, but can't a world phone with both antenna's say call on cdma and use the 4G provided by sprint? Or am I missing something? I kind of new at this so forgive the question if it is stupid. If there is a wiki on it please give me the link and I will be glad to read up. Thanks
qjsmartphone said:
one word IMPOSSIBLE!!!!!!!!!! GSM and CDMA are hardware radios an unlock is IMPOSSIBLE unless the phone is a world phone with both CDMA and GSM but your phone doesn't qualify so try getting a GSM/CDMA hybrid and then come back to me. However verizon will upgrade to LTE which is GSM based!!!!!!!! watch em LTE will allow voice and data at the same time. When LTE upgrade is complete say goodbye and good riddance to CDMA it will be shut down soon!!!!!
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Click to collapse
I'm not sure what you are talking about, but CDMA variant of Touch Pro 2 does have both GSM and CDMA hardware in them.
Also, LTE and WiMAX is a two new 4G technologies that will eventually replace 3G data.
LTE is not based on GSM, they are two different communication technologies.
Back to OP's question, if you are using CDMA branded TP2 you cannot surf and talk at a same time. It is limitation on CDMA technology.
4G and 3G is not compatible, is your grandparent's old 2G phone do 3G? no.
How about your 3G phone accesing 2G? yes. Usually when newer technology is being deployed, they make sure that it is backward compatible, so that they can lower battery consumption and remain accessible to area where new technology is not yet available.
Just be near wifi and then show them you can surf while talking.
segadc said:
Just be near wifi and then show them you can surf while talking.
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Click to collapse
I like the way you think
Or pop in a ATT or T-mobile SIM card and switch to GSM mode. The phone IS capable of voice and data when using GSM.
isdnmatt said:
Or pop in a ATT or T-mobile SIM card and switch to GSM mode. The phone IS capable of voice and data when using GSM.
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Click to collapse
I'll jump in here...
I thought Sprint/Verizon phones with both GSM/CDMA radios cannot use AT&T nor T-Mo SIM cards. I thought they only accepted the GSM SIM cards of countries outside the US.
Wait... HardSPL fixes that, doesn't it?... Oh well, I think I should stop stalking the CDMA forums when I have almost no idea on anything CDMA-related!
But, I'm still in favor of the WiFi suggestion!
mac people live in their own little world. don't let them bother you. sure, they can talk and surf the web at the same time...if they have 3g coverage. but there are areas where they have no coverage at all let alone 3g. then they can use the 'paper weight mode'. i also love how they tout their app store meanwhile we've had multiple wm app stores for years already. also i get to choose what apps i want to use without htc or sprint telling me what i'm allowed to.
segadc said:
Just be near wifi and then show them you can surf while talking.
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Click to collapse
this is what i would do
sumflipnol said:
I'll jump in here...
I thought Sprint/Verizon phones with both GSM/CDMA radios cannot use AT&T nor T-Mo SIM cards. I thought they only accepted the GSM SIM cards of countries outside the US.
Wait... HardSPL fixes that, doesn't it?... Oh well, I think I should stop stalking the CDMA forums when I have almost no idea on anything CDMA-related!
But, I'm still in favor of the WiFi suggestion!
Click to expand...
Click to collapse
i think you can use any SIM card you want if you phone is SIM Unlocked
yes you can use any sim card if your phone is sim unlock buy the Sprint TP2 is not working with us 3G
unlock
I called up VZW and told them I was going to Europe and wanted to use prepaid SIM cards instead of paying Big Red the $$. They gave me the SIM unlock code and now I can use T-Mo or AT&T SIM cards with no problem. Only downside is that their GSM frequencies are slightly off from the rest of the world so no high-speed data when using VZW on GSM carrier in the states...
Nate
qjsmartphone said:
one word IMPOSSIBLE!!!!!!!!!! GSM and CDMA are hardware radios an unlock is IMPOSSIBLE unless the phone is a world phone with both CDMA and GSM but your phone doesn't qualify so try getting a GSM/CDMA hybrid and then come back to me.
Click to expand...
Click to collapse
The CDMA Touch Pro 2 *is* a dual mode world phone with both GSM and CDMA.
sumflipnol said:
I'll jump in here...
I thought Sprint/Verizon phones with both GSM/CDMA radios cannot use AT&T nor T-Mo SIM cards. I thought they only accepted the GSM SIM cards of countries outside the US.
Click to expand...
Click to collapse
The Verizon TP2 has a simple SIM lock on it which is similar to standard GSM SIM locks. Remove the SIM lock and you can use any SIM card with a compatible network, including US networks.
The Sprint TP2 doesn't have a standard SIM lock, but instead has the US frequency bands disabled. Hence the need for a new radio.

what to do?

I have an unlocked tp and i talked with verizon trying to set it up to use it on there network and they say i cant use it with them even tho i have the good esn number and all? what should i do have you guys heard of this or was that guys just being stupid?
I think im going to resell it or trade it for a verizon version. if any one wants to trade for a sprint version thats unlocked and comes with many extras in the orignal bo x with a 1 gig card and the mighty rom with android I will sell or trade it for 160 its in great condition Davey
there are two types of wireless networks in the world: GSM and CDMA. your phone is GSM in hardware = can't be changed), and verizon's network is CDMA = not comaptible.
correct me if im wrong but the sprint is the cdma and the att is the gsm. this phone has mightys cdma rom on it. it would have bricked the phone if it was gsm right at least that is what all the info i have read has told me. I have even flashed it to the stock verizon rom which is cdma and it was fine. I have found a few pages in the wiki about how to use it on the verizon network i will try they look kinda complicated tho.
DadamsJR said:
correct me if im wrong but the sprint is the cdma and the att is the gsm. this phone has mightys cdma rom on it. it would have bricked the phone if it was gsm right at least that is what all the info i have read has told me. I have even flashed it to the stock verizon rom which is cdma and it was fine. I have found a few pages in the wiki about how to use it on the verizon network i will try they look kinda complicated tho.
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Click to collapse
sprint & verizon are cdma, t-mobile & at&t are gsm.
i haven't tried flashing a cdma rom on my fuze... i know it is highly unrecommended. but i am sure there is a way to tell if ur phone is gsm or cdma, probably by looking at the sticker under that battery.
Dad is correct.. Sprint is CDMA jsut like VZW... and there is an easier way to tell if it is GSM or CDMA..... Take off the batter cover.... Do you see a Sim Card? If Yes, then it is a GSM... If No, Then CDMA unless it is GSM and no sim card is in it.. then power it up... it will say SIM CARD MISSING... That will tell you that it is GSM.....
Hope that helps.
I know its cdma for a fact it has sprint across the front and it has a cdma rom on it

[Q] Xoom Verizon US with Sim 3G SFR

Hello Guys
Evrething in the title....
Can i use my SFR SIM card in the Xoom bought in US on VERIZON
Cheers
Benjamin
At this time, you can't, the 3G version is simlocked on Verizon network.
Even if i buy it in bestbuy without any fee contract ?
truiteur said:
Even if i buy it in bestbuy without any fee contract ?
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Click to collapse
Yes. Verizon doesn't even make use of the SIM slot for 3G (its made for LTE, and it doesn't even work right now). the Xoom is locked to Verizon CDMA.
good morning, the unlock on development section is fot unlock the baseband to all sim (for the 3G) or it s for other stuff?
Even if it's unlock, CMDA on US Xoom isn't compatible with 3G in europe
ok thank you....maybe it s like a blackberry 9630, it s CDMA but it have also the 3G inside it...
Apparently, the component is capable to be compatible with 3G network, but it needs to be flashed...
So, who's gonna do this?
sausalito said:
Apparently, the component is capable to be compatible with 3G network, but it needs to be flashed...
So, who's gonna do this?
Click to expand...
Click to collapse
this is the question.....maybe when the 3G version wil be aviable

[Q] HTC One - Switching From Verizon to ATT

Hello, It is my understanding that Verizon phones are unlocked. have an HTC One phone that I would like to switch from Verizon to ATT. When I put a new sim card in the phone, it seems the ATT network is being blocked. Any thoughts?
Mtru23 said:
Hello, It is my understanding that Verizon phones are unlocked. have an HTC One phone that I would like to switch from Verizon to ATT. When I put a new sim card in the phone, it seems the ATT network is being blocked. Any thoughts?
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Click to collapse
Vezion is a CDMA provider which does not use sim cards (only mini sims i think for specific devices) while att is GSM which uses both mini sims and regular sims.
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Trozzul said:
Vezion is a CDMA provider which does not use sim cards (only mini sims i think for specific devices) while att is GSM which uses both mini sims and regular sims.
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Thank you for your response. The HTC One has a mini sim card. I have an AT&T mini sim card to put in the phone, but when I do so it doesn't recognize the AT&T network and the CDMA/GSM setting is blocked. There is a way to switch networks. Could someone please help me out in identifying how? Thank you for your help in advance!
Trozzul said:
Vezion is a CDMA provider which does not use sim cards (only mini sims i think for specific devices) while att is GSM which uses both mini sims and regular sims.
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Verizon LTE phones are all sold unlocked and use sims. Also every model that I can think of sold in the last couple of years has GSM bands to be sold as "world phones". I appreciate the attempt to be helpful, but spreading misinformation is the opposite of that. After some more trial and error, it was an ATT provisioning issue

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