I have a question... when I go overseas w\ my old Infuse, I always had to flash a non-AT&T radio to truly "unlock" the device. The radio ATT had on the firmware made it so you can ONLY roam on the partners AT&T wanted you to be able to, even if you had a SIM from say Thailand.
For example, if I go to Thailand, there are about 5 GSM carriers. AT&T partners with 1 of them. If I put in a SIM from the UK who partners with 4 of them, the ONLY carrier the radio will let me latch onto is the ONE overlapping carrier that AT&T also partners with. Flashing a non-ATT radio resolves the issue, but it's quite frustrating to have had to deal with on the ATT Infuse, so I always used the Rogers radio, which didn't have the limitation.
I assume that's going to be the case with the AT&T SGSII that I just bought as well. Does anyone have any radio suggestions? And since we don't yet have ROM Manager, am I going to have to flash with my PC or what?
Thanks as always!
bella92108 said:
I have a question... when I go overseas w\ my old Infuse, I always had to flash a non-AT&T radio to truly "unlock" the device. The radio ATT had on the firmware made it so you can ONLY roam on the partners AT&T wanted you to be able to, even if you had a SIM from say Thailand.
For example, if I go to Thailand, there are about 5 GSM carriers. AT&T partners with 1 of them. If I put in a SIM from the UK who partners with 4 of them, the ONLY carrier the radio will let me latch onto is the ONE overlapping carrier that AT&T also partners with. Flashing a non-ATT radio resolves the issue, but it's quite frustrating to have had to deal with on the ATT Infuse, so I always used the Rogers radio, which didn't have the limitation.
I assume that's going to be the case with the AT&T SGSII that I just bought as well. Does anyone have any radio suggestions? And since we don't yet have ROM Manager, am I going to have to flash with my PC or what?
Thanks as always!
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Click to collapse
Interesting - I've never seen any indication that Rogers radios in the Infuse had this positive effect. Especially since the Indian users on the Infuse forums had no problems with any Indian carrier that had frequency bands the Infuse supported. Of course, maybe that's because they always used a local-carrier SIM, and not something a little wacky like a UK sim in Thailand with a US phone...
I9100 radios will not work on the I777.
Entropy512 said:
Interesting - I've never seen any indication that Rogers radios in the Infuse had this positive effect. Especially since the Indian users on the Infuse forums had no problems with any Indian carrier that had frequency bands the Infuse supported. Of course, maybe that's because they always used a local-carrier SIM, and not something a little wacky like a UK sim in Thailand with a US phone...
I9100 radios will not work on the I777.
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HEHE, yeah. AT&T has several roaming partners in India, so odds are they'd be able to use it just fine with any SIM even if a non-Indian SIM.
UK sims are not as uncommon as you think. MOST global travel sims are registered in the UK or Eastern Europe. Mine is a Tru SIM. Tru is from the UK (you may have heard of their VOIP service, TruPhone). The SIM has a US number, it's just UK-based, since their carriers are far ahead of the US in terms of EU roaming, so it gives the most beneficial rates of any SIM.
It's really the most noticeable in countries where AT&T only has 1 or 2 roaming partners, but the country has 4-5 GSM carriers. Most southeast asian countries like Philippines, Thailand, Malaysia, Singapore fall into this category, so it can be a bit annoying be limited by my phone. Even in Japan last month I had issues because the roaming carrier Tru will allow (almost any) didn't jive with what AT&T's radio wanted to attach to (it had weak signal). Flashing the rogers radio solved, but hopefully there will be radio updates out for GSII.
EDIT: it's likely that it's not less of a restriction, but just a better roaming relationship with more countries. Canadian Carriers are a bit more "traveled" and progressive than Ma Bell. AT&T loves to advertise that you can use your phone in many countries, but they don't say that in many countries the one and only provider they roam on has TERRIBLE coverage or only a tiny part of the country covered and just gives them a good deal to boost their roaming count.
BTW, good to see you again Entropy! I missed you the couple weeks I had Infuse while you were away, hehe. Glad to be back w\ a phone you have so I can enjoy the great things you put out!
I could be wrong, but i thought it was the SIM card that told the phone what towers were roaming and not roaming. The only way an AT&T phone would keep you from going on another providers towers in another country is if you were still using your AT&T SIM card, or if your phone simply didn't work on the band of the carrier you were trying to use.
benk016 said:
I could be wrong, but i thought it was the SIM card that told the phone what towers were roaming and not roaming. The only way an AT&T phone would keep you from going on another providers towers in another country is if you were still using your AT&T SIM card, or if your phone simply didn't work on the band of the carrier you were trying to use.
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Well a SIM is just like an ID, and the carriers will either let you register with that ID, or not let you register. However, AT&T in all of their glory modified the radio so when you go to a country, the radio will disallow access to a carrier. I am not quite sure how they do it. For example, if you go to Thailand w\ an ATT sim card you'll likely roam on DTAC or AIS. You can't roam on Tru w\ an AT&T sim card because they don't have a roaming agreement, but the phone fully works fine if you put a Tru sim into it. Where the radio also limits you somehow, is if you have a SIM from say O2 in the UK, and you pop it into an unlocked Infuse 4G, you can't roam onto Tru, even though Tru is a roaming partner of O2, and the phone fully supports the frequencies and everything works just fine.
Weird right? Now flash the Rogers radio. Since Rogers has Tru as a roaming partner, it works if you put in a Rogers SIM, Tru SIM, O2, etc.... that's where the mystery and misery lie. I'm really hoping they didn't do the same to the SGSII's radio.
Anyone on the stock UBLF2 update theirs to I9300UBBLG2 or I9300UBBLG5 yet?
Issues, stability?
Thanks,
-CC
CSC will not have anything to do with stability its only local area network settings . It is not the firmware .
jje
JJEgan said:
CSC will not have anything to do with stability its only local area network settings . It is not the firmware .
jje
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Yeap, I understand that, just wanted to be specific as to which version.
As it seems most of South America and the Caribbean region uses this "version" with some areas having additional updates and others not.
I ask because this seems to be the version that comes on international phones that can be acquired in the US/North America.
I know I can flash any region/area, but then it breaks the ability to update using Kies.
SIDENOTE: I took the Kies update I9300UBBLG2 and it has improved signal and battery life, not that my phone needed it really. But it's an observation, ofc that's very dependent to each users' service/area anyways. I am in Miami, FL USA on AT&T MVNO.
I am having a problem with 3G network for along time even though we have 3G coverage in my place
i installed lolipop 5.0.1 and it worked perfectly but the 3g problem still
im in north africa but my phone manufactured in brazil ,under the battery it's written ANATEL and a number of 10 digits following it Do you think this phone works only in brazil and only under Alcatel. network ?
now an idea comes into my mind is to install a brazil region ROM with a brazilian carrier , but some told me ROMs are all the same and it won't resolve your problem
Do you think this phone works only in brazil and only under Alcatel. network ?
Dear experts please advice me in my case .....Thank you in advance
Each phone is set to use different bands. So unless the band's match up you will have issues.
but i do not have that carrier in my country here
It's not the carrier. It's the band's that are programmed into the device itself. This is something you have to be very careful about when getting devices from other carriers and countries as they don't all use the same bands.
I would look your phone up and see what bands it supports and then check what bands tour carrier uses. It's most likely they don't use the same ones so you will never see 3g.
so how do i check the programmed band on my phone?
By checking the device under the carrier that it was made for.
Hi,
I have the unlocked SM-965U unlocked model that I've been using on Verizon in the US. I'm moving to the Netherlands and am wondering about modem / frequency compatibility.
Looking at the frequencies used by Verizon in the US and Vodafone in the Netherlands none of the 4G frequencies are the same, although the phone is theoretically compatible with all the frequencies of both carriers.
Will I get better reception if I can find the appropriate modem to flash using Odin?
Sorry if this is a dumb question but I've looked through the forum and can't find a straight answer.
Thanks!
I have a sm-g991b s21 5g. Trying to figure out how to unlock all the LTE modem bands, 5g would be a bonus. Right now it is the XSP CSC. I would like to unlock all the lte bands, or change the CSC to something that will work better here in Canada
Seems the XSP CSC only allows certain bands?
STZ-Mech said:
I have a sm-g991b s21 5g. Trying to figure out how to unlock all the LTE modem bands, 5g would be a bonus. Right now it is the XSP CSC. I would like to unlock all the lte bands, or change the CSC to something that will work better here in Canada
Seems the XSP CSC only allows certain bands?
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Click to collapse
I'm not much help, but have looked closely at these things. Yes, ea CSC region code is specific for that regions lte bands. The region code (rom) with the most enabled lte bands would be the 'Open' version for it's specific region.
There isn't, to my knowledge, a way to 'unlock all' lte bands. Some have flashed a different rom which has resulted in changing CSC, but that was a lot easier with earlier versions of android. With the most recent versions it's become more difficult. Some paid services supposedly can help with that.
But yer situation is worse. Your device is a (non-US) exynos chip device. And Canada uses the US type devices with Qualcomm Snapdragon chips. The roms are not interchangeable between device types. So there is no rom available for you to change to that would have the lte bands you need, unless some Asian country / region uses almost the same bands as Canada, which I don't think there is.
It's a hard lesson.