Hi , my phone has WCDMA along with GSM (XPERIA X1) but can't read a regular CDMA simcard !
I asked the network service but didn't get much help .
So is WCDMA really CDMA ? or is it a name for UMTS ?
Hass_x1 said:
Hi , my phone has WCDMA along with GSM (XPERIA X1) but can't read a regular CDMA simcard !
I asked the network service but didn't get much help .
So is WCDMA really CDMA ? or is it a name for UMTS ?
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WCDMA is an alias for UMTS.
Swyped from my HTC Desire running LeeDrOiD 2.3d with Tapatalk.
BodenM said:
WCDMA is an alias for UMTS.
Swyped from my HTC Desire running LeeDrOiD 2.3d with Tapatalk.
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But whatever you call it, it still uses the technology named "Code division multiple access", right ?
And a device supporting what is called WCDMA/UMTS only (and NOT what is called CDMA), will not speak to CDMA only cell sites.
Get's confusing when names are used in different contexts.
WCDMA is just a technology used in many networks, but it is used synonymously for the UMTS family (3GPP) as it is one of the core technologies in that 3g network technology.
CDMA is also just a technology used in even more networks, but may be falsely used synonymously for CDMA2000 (3GPP2) which is the technical name for the 3g networks used in the US for example.
Here are some Wikipedia Articles that should shed some light into the whole terms:
3GPP: http://en.wikipedia.org/wiki/3GPP (That are the people behind UMTS)
3GPP2: http://en.wikipedia.org/wiki/3rd_Generation_Partnership_Project_2 (That are the people behind the concurrinng technology used in the U.S.)
CDMA: http://en.wikipedia.org/wiki/Code_division_multiple_access (A networking technology not only used in mobile systems, but also in GPS for example)
W-CDMA: http://en.wikipedia.org/wiki/W-CDMA_(UMTS) (1.: Air interface most commonly used in UMTS Networks based on CDMA 2.: WRONGLY used synonymously for UMTS)
CDMA2000: http://en.wikipedia.org/wiki/CDMA2000 (Has two meanings: 1.: Air interface "CDMA2000 1X" that is the concurring technology to wcdma but serves the same purpose 2.: Family Name of Network Protocols also known as US-3G ### Here the synonymous usage for Air interface and Protocol family is ok as they are really named the same ###)
UMTS: http://en.wikipedia.org/wiki/Universal_Mobile_Telecommunications_System (Family Name of Network Protocols that uses WCDMA as an Air Interface and is commonly found as the 3G Network in Europe and Asia)
The post-3g mobile networks will use a single technology as the 3GPP2 companies stopped development of their own 4G standard in favor of LTE (a post-3g and not really 4g standard) and LTE Advanced (which will fully comply with the 4G definition).
Where LTE (Advanced) is based on the UMTS technology by the 3GPP People.
LTE: http://en.wikipedia.org/wiki/3GPP_Long_Term_Evolution (Post-3g / Pre-4g network based on UMTS)
LTE Advanced: http://en.wikipedia.org/wiki/LTE_Advanced (The "real" 4G network)
4G: http://en.wikipedia.org/wiki/4G (4th generation wireless cellular standard that is currently in the make)
CDMA is just a theoretical type of air interface... how the physical layer and data link layer work. I wouldn't expect all CDMA to be created equal. Not sure how Verizon got to the point where it became synonymous with CDMA, because lots of carriers use the technology. Each implementation varies quite a bit in terms of spectrum allocation, time division and things like that.
Any way of turning off 4g and enabling 3g while on GSM unlocked?
dragonhart6505 said:
Any way of turning off 4g and enabling 3g while on GSM unlocked?
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Changing to GSM/UMTS should turn off 4G LTE and read 3g/2g services from the SIM and APNs. For me, to enable 4g as well as GSM, I have to use *#*#INFO#*#* and select LTE/UMTS/GSM from the menu, otherwise setting UMTS/GSM from the standard mobile network menu puts it in GSM Auto (PRL) mode, which is just HSPA+, UMTS, EDGE, and GPRS frequencies. (3.5G, 3G, 2.5G, and 2G respectively). I have my Razr M setup with a Straight Talk AT&T sim for GSM and PagePlus on CDMA, service toggle works flawlessly after setting it up.
But yeah, if you go into the mobile network settings and change it to GSM/UMTS mode and set the proper APNs, you should get 3G without issue and the LTE radio should be off (since it only supports Verizon's LTE band anyway)
Skreelink said:
Changing to GSM/UMTS should turn off 4G LTE and read 3g/2g services from the SIM and APNs. For me, to enable 4g as well as GSM, I have to use *#*#INFO#*#* and select LTE/UMTS/GSM from the menu, otherwise setting UMTS/GSM from the standard mobile network menu puts it in GSM Auto (PRL) mode, which is just HSPA+, UMTS, EDGE, and GPRS frequencies. (3.5G, 3G, 2.5G, and 2G respectively). I have my Razr M setup with a Straight Talk AT&T sim for GSM and PagePlus on CDMA, service toggle works flawlessly after setting it up.
But yeah, if you go into the mobile network settings and change it to GSM/UMTS mode and set the proper APNs, you should get 3G without issue and the LTE radio should be off (since it only supports Verizon's LTE band anyway)
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Dandy, but those options aren't available on my current ROM eclipse v5b3.
dragonhart6505 said:
Dandy, but those options aren't available on my current ROM eclipse v5b3.
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I've not used that rom, but you should still have access to the secret menu, Open the dialer and type *#*#INFO#*#* (*#*#4636#*#*) > Phone information > Scroll down and select GSM auto (PRL) it's the same thing, GSM/UMTS only based on the SIM.
Skreelink said:
I've not used that rom, but you should still have access to the secret menu, Open the dialer and type *#*#INFO#*#* (*#*#4636#*#*) > Phone information > Scroll down and select GSM auto (PRL) it's the same thing, GSM/UMTS only based on the SIM.
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WCDMA Preferred would actually be a better choice and is the default choice on normal GSM phones, GSM auto (PRL) uses either 2g or 3g and just chooses whichever has stronger signal, WCDMA Preferred will make it use 3g as long as there is 3g signal and only drop to 2g if it has to.
msnuser111 said:
WCDMA Preferred would actually be a better choice and is the default choice on normal GSM phones, GSM auto (PRL) uses either 2g or 3g and just chooses whichever has stronger signal, WCDMA Preferred will make it use 3g as long as there is 3g signal and only drop to 2g if it has to.
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Yeah, but in my experience with using verizon global phones on gsm, trying to set this always changes itself back to gsm auto making WCDMA Preferred a moot option.
Skreelink said:
Yeah, but in my experience with using verizon global phones on gsm, trying to set this always changes itself back to gsm auto making WCDMA Preferred a moot option.
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WCDMA Preferred actually activates the 4g HSPA+ and GSM Auto only connects me to Edge: 2 making both of these options moot :-/
dragonhart6505 said:
WCDMA Preferred actually activates the 4g HSPA+ and GSM Auto only connects me to Edge: 2 making both of these options moot :-/
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Uhm... HSPA+ is actually 3.5G.. It's based on the UMTS 3G standard and is technically the same thing/catagory. "4G" is a marketing gimmick by AT&T and T-Mobile, they even had apple push an update on the iPhone when they started marketing it as 4g to change 3g to 4g on the phone. Although they did NOTHING to the capabilities of the phone. The phone does not differentiate between 3G UMTS and 3.5G HSPA+ as far as WCDMA/3G connections go, 4G should be referred to only on LTE, but carriers like their money. Remember AT&T used to tout the 'fastest 3g network' now they claim 'the largest 4g network' It's the SAME NETWORK, they just upped the number. T-Mobile actually offers a 42Mbps dual band HSPA+ network, whereas AT&T only has a 21Mbps HSPA+ network, both of them advertise as '4g' but they also have 4gLTE networks.
So in ALL technicality; their "4g" HSPA+ networks are ACTUALLY 3G networks... There is no way to force the phone to use only UMTS as it's the basis for HSPA being the 'same' network type. The only real 4G is LTE, which without a verizon SIM card, is disabled when not using an "LTE/CDMA" option.
Skreelink said:
Uhm... HSPA+ is actually 3.5G.. It's based on the UMTS 3G standard and is technically the same thing/catagory. "4G" is a marketing gimmick by AT&T and T-Mobile, they even had apple push an update on the iPhone when they started marketing it as 4g to change 3g to 4g on the phone. Although they did NOTHING to the capabilities of the phone. The phone does not differentiate between 3G UMTS and 3.5G HSPA+ as far as WCDMA/3G connections go, 4G should be referred to only on LTE, but carriers like their money. Remember AT&T used to tout the 'fastest 3g network' now they claim 'the largest 4g network' It's the SAME NETWORK, they just upped the number. T-Mobile actually offers a 42Mbps dual band HSPA+ network, whereas AT&T only has a 21Mbps HSPA+ network, both of them advertise as '4g' but they also have 4gLTE networks.
So in ALL technicality; their "4g" HSPA+ networks are ACTUALLY 3G networks... There is no way to force the phone to use only UMTS as it's the basis for HSPA being the 'same' network type. The only real 4G is LTE, which without a verizon SIM card, is disabled when not using an "LTE/CDMA" option.
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We need more clarification like yours on the interwebs ^_^ thank you. Either way, my issue appears to be throttle and neither option allows me to get above 8 kbs download speeds.
Still a shame they need to be so crude about their marketing. And I tried so hard not to be a sucker!
Skreelink said:
Uhm... HSPA+ is actually 3.5G.. It's based on the UMTS 3G standard and is technically the same thing/catagory. "4G" is a marketing gimmick by AT&T and T-Mobile, they even had apple push an update on the iPhone when they started marketing it as 4g to change 3g to 4g on the phone. Although they did NOTHING to the capabilities of the phone. The phone does not differentiate between 3G UMTS and 3.5G HSPA+ as far as WCDMA/3G connections go, 4G should be referred to only on LTE, but carriers like their money. Remember AT&T used to tout the 'fastest 3g network' now they claim 'the largest 4g network' It's the SAME NETWORK, they just upped the number. T-Mobile actually offers a 42Mbps dual band HSPA+ network, whereas AT&T only has a 21Mbps HSPA+ network, both of them advertise as '4g' but they also have 4gLTE networks.
So in ALL technicality; their "4g" HSPA+ networks are ACTUALLY 3G networks... There is no way to force the phone to use only UMTS as it's the basis for HSPA being the 'same' network type. The only real 4G is LTE, which without a verizon SIM card, is disabled when not using an "LTE/CDMA" option.
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Minor correction: AOSP and maybe stock (not sure...) do indicate HSPA+ in the status bar by changing it from 3g to H+
Also, technically LTE isn't 4g either, but it's the closest to 4g you can get.
IIRC it's ~50mbps ideal and ITU 4g standard is like 100. H+ is like 30 or 40. Of course, my numbers may be way off... It's something like that though
Also, there's no GSM/LTE option? Could've sworn there was one...
Sent from my XT907 using Tapatalk 4
sloosecannon said:
Minor correction: AOSP and maybe stock (not sure...) do indicate HSPA+ in the status bar by changing it from 3g to H+
Also, technically LTE isn't 4g either, but it's the closest to 4g you can get.
IIRC it's ~50mbps ideal and ITU 4g standard is like 100. H+ is like 30 or 40. Of course, my numbers may be way off... It's something like that though
Also, there's no GSM/LTE option? Could've sworn there was one...
Sent from my XT907 using Tapatalk 4
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The stock rom shows H+ and next gen lte is 300mbps capable, current is ~100mbps. I have seen someone hit 45mbps on a droid 4. Course you won't see anywhere near ideal max. Hspa+ is 21Mbps dual band hspa is 42Mbps. As I recall they are working on a 1Gbit lte, but that will be a long way out. There is an lte/gsm option, but since the M doesn't support lte bands besides verizon, kinda useless. Lte sim will be lte/cdma verizon.
While on cdma my phone shows 3g for evdo and H+ for hspap. (I have pageplus and att sim straight talk on my M).
Skreelink said:
The stock rom shows H+ and next gen lte is 300mbps capable, current is ~100mbps. I have seen someone hit 45mbps on a droid 4. Course you won't see anywhere near ideal max. Hspa+ is 21Mbps dual band hspa is 42Mbps. As I recall they are working on a 1Gbit lte, but that will be a long way out. There is an lte/gsm option, but since the M doesn't support lte bands besides verizon, kinda useless. Lte sim will be lte/cdma verizon.
While on cdma my phone shows 3g for evdo and H+ for hspap. (I have pageplus and att sim straight talk on my M).
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Gotcha.
1gbit? So you can burn up a 10 GB data plan in 40 seconds! YAY! I WANT ONE!
Sent from my XT907 using Tapatalk 4
Background: I am operating a private lab system that emits 3G (UMTS) and 4G (LTE). The hardware uses the Radisys stack for both 3G and 4G radios so its got industry standard layer 3 signalling, however the neighbor lists and paths on the backend between the 4G (SGW) and 3G (SGSN) to perform a proper handover have not been implemented so I'm looking for a way to force the phones to perform their own pseudo handover (hard handover) anytime they detect the LTE signal present no matter how faint it may be in relation to the 3G carrier.
I can get the phones onto LTE manually by either going into *#*#4636#*#* and selecting LTE only, or by shutting off the UMTS basestation and effectively forcing the phones out of UMTS coverage. The problem arises when both 3G and 4G carriers are in simultaneous operation. With the phones set to prefer LTE and the radio set to GSM/LTE (Auto PRL), upon initial power-up the phones will default to LTE. If the phone does not default to 4G, I can force it over by going into *#*#4636#*#* and selecting LTE only. However, anytime a call is made and after the phones perform their circuit switched fallback to 3G, they ultimately will attach to HSPA and remain there unless I manually force them back over to LTE even after the call has ended.
Granted this is a network configuration problem as I previously mentioned, the paths and neighbor lists for 3G <--> 4G handovers is not yet there and I'm currently working with the equipment vendors to have this functionality implemented but in the meantime, I'm looking for an app/hack/hidden developer option/etc... to force the phones to reselect LTE no matter what. Currently various Cyanogenmod ROMS/Factory ROMS/Rooted ROMS + various modem/baseband combo's + Mobile networks set to "Prefer LTE" is not getting the job done.
Didn't know where else to ask this question.
Thanks,
-Adam
Hi,
Thanks for using XDA Assist kindly visit here Samsung Galaxy S4 Help and Troubleshooting
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My phone: Lumia 950XL.
I ust got off the phone with T-Mobile tech support and they tell me my phone doesn't support band 12 which is the 700 band that breaks through concrete. Anyone have this phone with good T-Mobile LTE service. I found that my phone does have band 12 by typing ##3282# on my phone dialer then sending the call. It shows this band in a long list of other bands. The band is also check marked showing that it's active.
As I understand it, the issue isn't whether the phone is capable of using LTE Band 12 (700 MHz), but T-Mobile's requirement that the phone support VoLTE as they are deploying Band 12 as LTE-only and in areas where they don't have alternate UMTS support on other bands that the phone can drop into for calls. Unfortunately, VoLTE and WiFi Calling implementations are carrier-specific in the US and Microsoft doesn't seem to be able to support either on non-branded phones. Similar issues exist for me with my 950 XL on AT&T - no HDVoice (VoLTE) or WiFi Calling available.
I have a ta-1083 with bands b7 and b28 blocked, I've searched in several places on google and still could not find something that can release these bands,
Has anyone with this problem been able to solve this problem?
I like the device, but it's already boring with this situation
Thank you all
No way. It's not going to happen. Quit wasting your time and buy another phone that has the bands you need.
Thanks for the answer, and this is very sad to read
6.1 plus supports all the bands. You can use this code *#*#4636#*#* to change bands and it works.
gopu5 said:
6.1 plus supports all the bands. You can use this code *#*#4636#*#* to change bands and it works.
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Yes, it runs on 4g, but in bands like b5 and b3, but these are not standard here in Brazil, the network with the largest coverage is b7 that runs at 2600mhz,
So it fluctuates a lot between bands and often loses the signal altogether
I've changed a lot in these settings, but it doesn't solve 100%
JavaDroid_ said:
Yes, it runs on 4g, but in bands like b5 and b3, but these are not standard here in Brazil, the network with the largest coverage is b7 that runs at 2600mhz,
So it fluctuates a lot between bands and often loses the signal altogether
I've changed a lot in these settings, but it doesn't solve 100%
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LTE only option you can choose
gopu5 said:
6.1 plus supports all the bands. You can use this code *#*#4636#*#* to change bands and it works.
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Click to collapse
No, you don't know what a band is. You can't use the test menu to add additional LTE bands. Kindly refrain from posting this idiocy here.
I know what is LTE Bands. 6.1 Plus supports all the bands but the fact it is configured in such a way the user can't change it hence the network switches bands automatically.
The LTE Only option configure the network to the 4G but yes you don't have the option to lock a particular frequency unlike other stock Android devices.
I dont know about other countries but here in India I use Jio 4G with 6.1 Plus my phone locks into 850Mhz , 1800Mhz & 2300Mhz (Jio supports it) simultaneously depending upon the conditions in my location.
The Android one might have disabled advanced band locking (FDD & TDD) feature. I'm not talking idiocy here.
gopu5 said:
I know what is LTE Bands. 6.1 Plus supports all the bands but the fact it is configured in such a way the user can't change it hence the network switches bands automatically.
The LTE Only option configure the network to the 4G but yes you don't have the option to lock a particular frequency unlike other stock Android devices.
I dont know about other countries but here in India I use Jio 4G with 6.1 Plus my phone locks into 850Mhz , 1800Mhz & 2300Mhz (Jio supports it) simultaneously depending upon the conditions in my location.
The Android one might have disabled advanced band locking (FDD & TDD) feature. I'm not talking idiocy here.
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You are not talking about the same thing. The OP of this thread wanted to unlock bands that this phone doesn't normally support. We're not talking about "band locking".
Oh yeah this doesn't supports 2600Mhz