Question for those who know more than I do... If someone gets a sprint S8+ unlocked (A SPRINT DEVICE THAT HAS BEEN UNLOCKED NOT A FACTORY UNLOCKED DEVICE) to use on GSM (T-mobile, AT&T, etc) will it get all the GSM/LTE freqencies and bands for usa gsm services like T-mobile, AT&T, etc... Or are the SPRINT S8+ crippled on the GSM frequencies?
Araltd said:
Question for those who know more than I do... If someone gets a sprint S8+ unlocked (A SPRINT DEVICE THAT HAS BEEN UNLOCKED NOT A FACTORY UNLOCKED DEVICE) to use on GSM (T-mobile, AT&T, etc) will it get all the GSM/LTE freqencies and bands for usa gsm services like T-mobile, AT&T, etc... Or are the SPRINT S8+ crippled on the GSM frequencies?
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If you flash the U1 firmware that comes from the unlocked US phones, you should be good if the phone's already network/SIM unlocked-that firmware doesn't have the carrier bloat, but it detects the SIM card inserted and will adjust the network stuff accordingly so that it operates on the right bands, etc. If you'd prefer to have all the carrier apps/ bloat as well, there are several threads on carrier switching. Flashing the U1 firmware is fairly straightforward and easy, and most carrier features work; Switching from Sprint firmware to another carrier's firmware is a bit more involved but still totally doable. You're going to have to do one of the two though.
Edit: All of the US models have the exact same hardware, with all of the same radios...the unlocked model is the exact same as a variant from T-Mobile/Sprint/etc. It's just the CP & CSC firmware files that dictate the network stuff.
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Will this be the same hardware as other carriers like the S7's were? I was reading that T-Mobiles new band 66 will be usable(unused frequency) on the S8's. If Tmobile ever works in my area I would like to know if I can flash TMO firmware on my device or U firmware to my device like you could on S7's. On S7's you could go between cdma and gsm carriers with a flash Anyone have a link to network specs of S8's?
johnwayne27 said:
Will this be the same hardware as other carriers like the S7's were? I was reading that T-Mobiles new band 66 will be usable(unused frequency) on the S8's. If Tmobile ever works in my area I would like to know if I can flash TMO firmware on my device or U firmware to my device like you could on S7's. On S7's you could go between cdma and gsm carriers with a flash Anyone have a link to network specs of S8's?
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root is completely a lost cause and will never happen most likely on any AT&T samsung device
I never mentioned root, wrong post?
You dont need root to flash firmware in odin
johnwayne27 said:
Will this be the same hardware as other carriers like the S7's were? I was reading that T-Mobiles new band 66 will be usable(unused frequency) on the S8's. If Tmobile ever works in my area I would like to know if I can flash TMO firmware on my device or U firmware to my device like you could on S7's. On S7's you could go between cdma and gsm carriers with a flash Anyone have a link to network specs of S8's?
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They will all be exactly the same. There will be only one model in the US. If you sim unlock, and switch sims, do a factory reset, it will boot with the new carriers boot screen and bloat. Currently testing S8 and had mine locked to Att, but switched to Tmobile
bossg4 said:
They will all be exactly the same. There will be only one model in the US. If you sim unlock, and switch sims, do a factory reset, it will boot with the new carriers boot screen and bloat. Currently testing S8 and had mine locked to Att, but switched to Tmobile
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Any place you can point to that confirms in writing the carrier variants all aupport the same bands? The carrier websites all show different band support from what ive found so far.
954wrecker said:
Any place you can point to that confirms in writing the carrier variants all aupport the same bands? The carrier websites all show different band support from what ive found so far.
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I do not, I looked as well. When I asked about my Att phone booting up with T-mobile boot after unlock and Sim swap, I was told it was called one sku. I have see att to T-mobile swap as well as Verizon to Att. Even though my device was locked to att, i can connect to new lte u network.
bossg4 said:
I do not, I looked as well. When I asked about my Att phone booting up with T-mobile boot after unlock and Sim swap, I was told it was called one sku. I have see att to T-mobile swap as well as Verizon to Att. Even though my device was locked to att, i can connect to new lte u network.
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What phone are you speaking about?
bossg4 said:
I do not, I looked as well. When I asked about my Att phone booting up with T-mobile boot after unlock and Sim swap, I was told it was called one sku. I have see att to T-mobile swap as well as Verizon to Att. Even though my device was locked to att, i can connect to new lte u network.
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There is only 1 model number
So I bought a T-Mobile unlocked Galaxy S7 (SM-G930T) after reading that there was no difference between unlocked phones except for bloatware. It seems now like that was not entirely correct. My H2o Wireless sim uses the AT&T network, but in my new phone it gets little or no reception almost everywhere I go. It works great in the unlocked Nexus 5 that I'm trying to replace. I have found some scary instructions on these forums and elsewhere that would enable more frequency bands or convert my phone to a SM-G930U. Is that the right way to go, or is there a simpler way to get my old sim card working?
The different variants of the S7 come with carrier specific firmware, so the T-Mobile firmware may not use the modem in the same way as AT&T expects.
Flashing the G930U firmware is probably a good idea, and it's not too difficult http://updato.com/how-to/how-to-install-an-official-samsung-stock-firmware-using-odin
I was also under the impression the G930T was SIM locked by default, unless you got them to unlock it.
Beanvee7 said:
I was also under the impression the G930T was SIM locked by default, unless you got them to unlock it.
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This G930T was labeled "T-Mobile unlocked" on Ebay. I doubt that it got any special treatment. My H2o sim card works, just not very well.
Digging a little deeper, the app Network Cell Info Light tells me I'm using bands 2, 4, and 12. It also tells me I'm using band 5 if I run a USSD code. Bands 2, 4, and 12 are used by both T-Mobile and AT&T, so those make sense. Band 5 is used by AT&T but not T-Mobile, so I don't know why they have that one enabled (or maybe the list of bands I found is wrong). Unfortunately, the same app doesn't display which bands are in use by my Nexus 5 so I can't compare. If I could use AT&T's other bands (17 and 30) maybe things would work better.
Flashing the G930U firmware or even the G930A firmware (although I think the G930A is now the G930U) could change the bands. All of the USA models use the same modem, so if some bands are enabled on one and not the other, it would entirely be firmware.
Beanvee7 said:
Flashing the G930U firmware or even the G930A firmware (although I think the G930A is now the G930U) could change the bands. All of the USA models use the same modem, so if some bands are enabled on one and not the other, it would entirely be firmware.
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Thank you. I'll probably follow your firmware how-to once I can find a chunk of time to work on it. Why do you suppose the G930A and G930U are the same while the G930T is different? Maybe I bought the wrong one. I went with the G930T because I read a few places that it had the least bloatware.
From memory AT&T used to have their own specific branded model like T-mobile, but they eventually discontinued the G930A and just started offering the unbranded version.
Then I believe from that point onwards G930A's just got the G930U firmware updates. So they were once different but aren't any more.
G930U would have the least bloatware because it's the non carrier unbranded version of the phone, most people will flash it over their own phone to remove bloat. G930T may be the least bloated of carrier branded phones, but G930U is least bloated overall.
From a technical level the phones are all identical, it's just how the carrier has customised their firmware. You having the G930T isn't really a problem because you can just flash any other USA model firmware and get the same experience as if you bought it from them branded as theirs.
I flashed a SM-G930U firmware (SM-G930U_2_20181023083753_yako40hi3m_fac.zip) using Odin3 v3.13. That got rid of the T-Mobile bloatware, which is nice, but I still have the same signal problems I had before. Any other ideas? I wonder if this model has an antenna or some other piece of hardware that limits the frequency bands. I very briefly saw Network Cell Info Lite pick up a signal on Band 30, which I had never seen before. Maybe I'll see more of that if I get a chance to take the phone farther from home.
I wish to change my carrier from AT&T which is GSM based to one that is CDMA based, however the G955U has a GSM-locked bootloader by default. Considering that all Galaxy S8+'s have hardware CDMA support regardless of carrier, is it possible to flash a Verizon bootloader or anything of that sort to be able to use my phone on a CDMA carrier?
Thanks!
Looking at purchasing an S8+ second hand. How's the band support work across carrier versions? It's a smg955uzvv, which is a Vz model. Is it possible to flash the unlocked or T-Mobile firmware and if so will that activate all of the respective bands?
nameback said:
Looking at purchasing an S8+ second hand. How's the band support work across carrier versions? It's a smg955uzvv, which is a Vz model. Is it possible to flash the unlocked or T-Mobile firmware and if so will that activate all of the respective bands?
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They are nearly world wide universal. If its network unlocked. You can flash the tmobile so you have their apps. Or flash the unbranded csc files to make it bloat free. The newer samsungs are awesome with compatibility
Will an unlocked TMobile version of this phone work on an existing Verizon line without having to ask verizon to white list the imei or add cdma less etc?
I have
pj1980 said:
Will an unlocked TMobile version of this phone work on an existing Verizon line without having to ask verizon to white list the imei or add cdma less etc?
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I have Unlocked T-mobile A71 5G, It works on Verizon network like 4G LTE (just swap the SIM card even I have 5G Sim card from Verizon) but NO 5G because they are using different 5G Band.
I have the same question, but on cricket wireless, I can't get the phone to login to their network
It works just fine on any GSM/LTE network. I have not checked this personally for this device, but depending on the variant you have, you may be missing some LTE or 5G bands specific Verizon. You may not get full performance. That must be verified though.