[Q] will tmobileVibrant work in an 800/1800 network? - Vibrant Q&A, Help & Troubleshooting

hi i have a tmobile galaxy S vibrant which i believe is on the 1900 cellular band and the data is on the 1700 band.
i am traveling to a country which is on the 900/1800 cellular band and 2100 data.
will my phone work there with a locally purchased sim?
im going to israel
will data work if buy a local data package? (edge or otherwise)
thank you

[email protected] said:
hi i have a tmobile galaxy S vibrant which i believe is on the 1900 cellular band and the data is on the 1700 band.
i am traveling to a country which is on the 900/1800 cellular band and 2100 data.
will my phone work there with a locally purchased sim?
im going to israel
will data work if buy a local data package? (edge or otherwise)
thank you
Click to expand...
Click to collapse
As you can see below if it is 1800 yes, 800 no. And for Data yes.
Technology
GSM: 850, 900, 1800, 1900 MHz
UMTS: 1700/2100, 1900, 2100 MHz
Data: HSDPA 7.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS, EDGE
Positioning: A-GPS
Navigation: Yes
http://www.phonearena.com/phones/Samsung-Vibrant_id4747

Wrong thread, meant for Q/A.

whatiznt said:
Wrong thread, meant for Q/A.
Click to expand...
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This is the Q/A forum.
Sent from my SGH-T959 using XDA Premium App

No, it is general, unless you were moved by a mod...
- From my iPad!

Related

[Q] Will this phone pick up 3G on AT&T when unlocked?

I have the HTC Radar 4G on T-Mobile. Once I unlock it and use it on At&T, it will definitely do calls, but will it pick up 3G or 4G on the AT&T network? I asked HTC and they were unsure. Thanks!
Do a search in this forum to find your answer.
Sent from my Titan using XDA Windows Phone 7 App
AT&T uses 850 MHz / 1900 MHz for GSM/GPRS/EDGE and the same two frequencies (850 / 1900) for UMTS/HSPA (their 3G/4G service).
T-Mobile uses the same frequencies (850 / 1900) for GSM/GPRS/EDGE, but uses 2100 MHz and 1700 MHz for UMTS/HSPA/AWS (their 3G / 4G network).
If you want to know what phones will work where, compare the frequencies they receive with those of the carrier you want to use.
In the case of the Radar, it uses the following frequencies
GSM/GPRS/EDGE: 850 MHz; 900 MHz; 1800 MHz; 1900 MHz
UMTS/HSPA: 1700 MHz; 2100 MHz
So, for GSM phone calls and data you have a match with AT&T (and, of course with T-Mobile). 3G / 4G is a different story. The Radar has the T-Mobile 3G/4g bands, but not the bands for high-speed data on AT&T.
So, if you are happy just making phone calls and using EDGE data, then you can use the phone on AT&T. If you want 3G /4G as well you have to stick with T-Mobile.
bleh bleh +10
I finally was able to get the h2O SIM card (AT&T service) and surprisingly it picks up 3G! I definitely notice the difference from when it goes from 2G up to the 3G speeds
http://www.htc.com/us/products/radar4g-tmobile?view=1-1&sort=0#tech-specs
Apparently. It says it does 2100/1900/1700/850
*T-Mobile only uses 1700/1900 bands. source
Interesting! I took my specs from the T-Mobile page which omits the UMTS 850/1900 band. Thanks for the correction.
The box clearly states GSM 850/900/1900/2100 AND HSPA/UMTS: 1700/1900/2100
AWS 1700 = T-Mobile, Wind, Mobilicity
UMTS 1900 = AT&T (although they use 850 extensively too), Rogers, Telus, etc
UMTS 2100 = Asia/Europe
My Radar picks up AT&T 3G. Not sure if UMTS 1900 band will be omnipresent on AT&T as a lot have been extended with HSPA 850 as well.
So, whereever you find UMTS 1900, you'll definitely catch AT&T 3G
Hope this helps.
So, will this work with the medianet plan?
z33dev33l said:
So, will this work with the medianet plan?
Click to expand...
Click to collapse
YES!! Gets 6M downloads, 1.5M uploads.

does the international s3 work with TMobile data?

Want to get the s3 but want to make sure it works with TMobile.
No, you will only get edge speeds, no 3g.
Sent from my GT-I9300 using xda premium
It works for me. Bought my unbranded, non-simlocked phone in Europe. Visiting US now. Daily plan with T-Mobile works fine for me.
Sent from my GT-I9300 using Tapatalk 2
shaft77 said:
It works for me. Bought my unbranded, non-simlocked phone in Europe. Visiting US now. Daily plan with T-Mobile works fine for me.
Sent from my GT-I9300 using Tapatalk 2
Click to expand...
Click to collapse
And you are getting 3g speeds??
I doubt that, the international version doesn't have the frequency for tmo's 3g.
Sent from my GT-I9300 using xda premium
i also tried my att i747 sgs iii after i unlocked it with a t mobile sim.. works but also only get edge.. maybe it would work if i flashed the t mobile modem?
lgkahn said:
i also tried my att i747 sgs iii after i unlocked it with a t mobile sim.. works but also only get edge.. maybe it would work if i flashed the t mobile modem?
Click to expand...
Click to collapse
Sorry I pressed thanks instead of quote.
No, its nothing to do with the modem. If it was, people all over the world would be buying devices from other countries.
The fact is the international GSM version only works on the frequencies its designed to work on. This is a hardware limitation and no amount of software will resolve that.
International frequencies are different to USA frequencies and as such, devices not designed for the USA will not work to their full potential in the USA.
UK (international) uses 900 Mhz/1800Mhz GSM/3G where as USA T-mob uses 1900Mhz GSM and 2100Mhz 3G.
Because the International GSM quad band device is:
850/900/1800/1900 MHz...
The GSM and 2G function works on 1900 (T-mob) but has no way to use 2100 for 3G as its not physically possible
Edit:
USA Carrier Voice Frequencies (MHz) 3G 4G Notes
AT&T 850 (Band 5)/ 1900(Band 2) 850 / 1900 Band 17 (700MHz)/AWS (1700/2100 MHz) GSM
MetroPCS 1900 / AWS 1900 / AWS AWS CDMA
Sprint 1900 1900 2500 / 1900 G-Block CDMA
T-Mobile USA 1900 AWS(1700/2100 MHz)/PCS (1900) AWS (1700/2100 MHz) GSM
Verizon 800 / 1900 800 / 1900 700 / AWS CDMA (GSM for 4G)
http://en.wikipedia.org/wiki/Cellular_frequencies
rootSU said:
Sorry I pressed thanks instead of quote.
No, its nothing to do with the modem. If it was, people all over the world would be buying devices from other countries.
The fact is the international GSM version only works on the frequencies its designed to work on. This is a hardware limitation and no amount of software will resolve that.
International frequencies are different to USA frequencies and as such, devices not designed for the USA will not work to their full potential in the USA.
UK (international) uses 900 Mhz/1800Mhz GSM/3G where as USA T-mob uses 1900Mhz GSM and 2100Mhz 3G.
Because the International GSM quad band device is:
850/900/1800/1900 MHz...
The GSM and 2G function works on 1900 (T-mob) but has no way to use 2100 for 3G as its not physically possible
Edit:
USA Carrier Voice Frequencies (MHz) 3G 4G Notes
AT&T 850 (Band 5)/ 1900(Band 2) 850 / 1900 Band 17 (700MHz)/AWS (1700/2100 MHz) GSM
MetroPCS 1900 / AWS 1900 / AWS AWS CDMA
Sprint 1900 1900 2500 / 1900 G-Block CDMA
T-Mobile USA 1900 AWS(1700/2100 MHz)/PCS (1900) AWS (1700/2100 MHz) GSM
Verizon 800 / 1900 800 / 1900 700 / AWS CDMA (GSM for 4G)
http://en.wikipedia.org/wiki/Cellular_frequencies
Click to expand...
Click to collapse
yes i agree for international version.. but if you read closer i DONT have the international version but the att version.. and as far as i know all the usa versions are the same with just diff. modems.
The international version will work in areas where T-Mobile is refarming 1900mhz to 3G. However this is only happening in parts of the coasts. I'm using it in Ohio and getting EDGE only. That said, it isn't too bad.
Sent from my GT-I9300 using Tapatalk 2
joshnichols189 said:
The international version will work in areas where T-Mobile is refarming 1900mhz to 3G. However this is only happening in parts of the coasts. I'm using it in Ohio and getting EDGE only. That said, it isn't too bad.
Sent from my GT-I9300 using Tapatalk 2
Click to expand...
Click to collapse
Erm, it's being tested in some coastal areas, but the 3g/hspa+ over the 1900 band is slated to go live on the majority of the network by the end of the year.
Sent from my GT-I9300 using Tapatalk 2
No service HELP or clairfication PLEASE
I purchased a Tinji i9300. I have been working on this for over 3 weeks. I have no service with T-mobile. It recognizes my SIM card as T-mobile. In Engineer Mode, my bands are, EGSM900, DCS1800, PCS1900, GSM850, WCDMA-IMT-2000. I have tried numerous ROMs (stock and custom) and have rooted the phone. I have changed the IMEI. No service at all. Any thoughts? Band issue? T-mobile issue? Possible solution? **** out of luck? :crying:
Thank you!

[Q] AT&T 3G on mini pro U20i

i was gonna ask if it possible to get AT&T 3G bands 850 & 1900 Activated on this phone thanks. if you know about this you can help me thank you..
shadowpr2007 said:
i was gonna ask if it possible to get AT&T 3G bands 850 & 1900 Activated on this phone thanks. if you know about this you can help me thank you..
Click to expand...
Click to collapse
The U20i supports gsm (2g) on 850, 900, 1800 and 1900
and HSDPA (3g) on 850. 1900 and 2100 by default...
SmG67 said:
The U20i supports gsm (2g) on 850, 900, 1800 and 1900
and HSDPA (3g) on 850. 1900 and 2100 by default...
Click to expand...
Click to collapse
Mines only says that can conect on the box to wcmda 900 & 2100
shadowpr2007 said:
Mines only says that can conect on the box to wcmda 900 & 2100
Click to expand...
Click to collapse
You're right... I accidentally listed the networks for the U20a...
The two types were sold in different regions. (or by different providers, dependant on which frequencies they used), but there is no way to make it work on other frequencies... it's a hardware issue as far as I'm aware.

[Q] No HSDPA or 3G on E970 but Nexus 4, What to do?

Hello all. I've just got LGOG recently. Everything seems to work fine except I can't get HSDPA or 3G with this phone. With Nexus 4 and my current sim, I can get HSDPA and/or 3G in the same area. I use the same apn setting but I can only get Edge on my OG.
What I have tried:
- Got to the service [email protected] Only and change Network mode to WCDMA 1900 >>> didn't work. Shows only EDGE.
- Service [email protected] Only then RAT selection and change to WCDMA only >>>> phone won't get any signal.
I would be appreciated if anyone can shred some lights. I was about to sell my Nexus 4 but I have to think again if I can't even get 3G with OG in my area. Thanks!!!
What carrier are you on?
Sent from my Optimus G using xda app-developers app
I am using Walmart family mobile. The APN is set to use epc.tmobile.com in Nexus 4. I tried the same thing in LGOG but I have no luck.
Not sure what's wrong with your phone. I switch between my nexus 4 & og when the batteries die, and data always work.
Sent from my Optimus G
Is it about the 1700/2100 frequency that OG uses for LTE ? I took my friend's AT$T sim card and put in my OG. The 4G works fine.
Ace42: I saw your post about flashing OG radio to N4 radio. Will the flash mod the radio of OG to be exactly the same as what N4 has? For example, will it change from:
GSM: 850, 900, 1800, 1900 MHz
UMTS: 850, 1900, 2100 MHz
FDD LTE: 700 (band 17), 1700/2100 (band 4) MHz
to:
GSM: 850, 900, 1800, 1900 MHz
UMTS: 850, 900, 1700/2100, 1900, 2100 MHz
If so, I would like to try it out but is the mod reversible ? I am pretty new about this so please excuse met if I might ask some stupid questions. Thank you so much.
dohdies said:
Is it about the 1700/2100 frequency that OG uses for LTE ? I took my friend's AT$T sim card and put in my OG. The 4G works fine.
Ace42: I saw your post about flashing OG radio to N4 radio. Will the flash mod the radio of OG to be exactly the same as what N4 has? For example, will it change from:
GSM: 850, 900, 1800, 1900 MHz
UMTS: 850, 1900, 2100 MHz
FDD LTE: 700 (band 17), 1700/2100 (band 4) MHz
to:
GSM: 850, 900, 1800, 1900 MHz
UMTS: 850, 900, 1700/2100, 1900, 2100 MHz
If so, I would like to try it out but is the mod reversible ? I am pretty new about this so please excuse met if I might ask some stupid questions. Thank you so much.
Click to expand...
Click to collapse
The radio bands are hardware dependent, you will not get additional bands from a radio. It is just the att modems may give no mic or speaker audio on T-Mobile and its MVNOs.
Sent from my Optimus G
Thanks for the clarification. I actually tried to flash the phone last night and it doesn't work. I think I will just need to wait for T-Mobile to refarm this area then.
dohdies said:
Thanks for the clarification. I actually tried to flash the phone last night and it doesn't work. I think I will just need to wait for T-Mobile to refarm this area then.
Click to expand...
Click to collapse
They mostly rearmed major cities, there's a service map that shows how very few areas have rearmed 1900.
Sent from my Optimus G

Is the Alpha fully compatible with US AT&T?

It seems like the Samsung Galaxy Alpha has all the necessary bands to be used with AT&T in the US. But does anyone know for sure? If Samsung takes too long to release this in America can I buy the UK version and use it in the US?
Thanks
derekmarch said:
It seems like the Samsung Galaxy Alpha has all the necessary bands to be used with AT&T in the US. But does anyone know for sure? If Samsung takes too long to release this in America can I buy the UK version and use it in the US?
Thanks
Click to expand...
Click to collapse
Bump. I have the same question.
GSM Arena says this about the device:
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 900 / 1900 / 2100
4G Network LTE 800 / 850 / 900 / 1800 / 1900 / 2100 / 2600
If what wikipedia says, AT&T uses the following frequencies:
2G: 850 / 1900.
3G: 850 / 1900.
4G: 700 block B (main frequency) / 1700 AWS / 1900 / 2300.
So, if I read correctly, you can use the international Alpha for 2&3G, but for LTE, you are covered only by one LTE band, 1900, and this being not a main frequency, won't have good coverage everywhere, I think.
sirobelec said:
GSM Arena says this about the device:
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 900 / 1900 / 2100
4G Network LTE 800 / 850 / 900 / 1800 / 1900 / 2100 / 2600
If what wikipedia says, AT&T uses the following frequencies:
2G: 850 / 1900.
3G: 850 / 1900.
4G: 700 block B (main frequency) / 1700 AWS / 1900 / 2300.
So, if I read correctly, you can use the international Alpha for 2&3G, but for LTE, you are covered only by one LTE band, 1900, and this being not a main frequency, won't have good coverage everywhere, I think.
Click to expand...
Click to collapse
Does this pertain to HSPA+ too?
blairh said:
Does this pertain to HSPA+ too?
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Click to collapse
HSPA+ is 3G, so you shouldn't have problems with it.
sirobelec said:
HSPA+ is 3G, so you shouldn't have problems with it.
Click to expand...
Click to collapse
So I'd get HSPA+ anywhere I'd get it from an AT&T phone, just not LTE necessarily?
blairh said:
So I'd get HSPA+ anywhere I'd get it from an AT&T phone, just not LTE necessarily?
Click to expand...
Click to collapse
Yes. If it was me to make the decision, I'd want my phone with an unlocked bootloader, HSPA+ is good enough speed for me.
Though, practically, I've never tested LTE in my life, until recently we didn't have any 4G networks.
International Galaxy Alpha NO US LTE on ATT or TMO
derekmarch said:
It seems like the Samsung Galaxy Alpha has all the necessary bands to be used with AT&T in the US. But does anyone know for sure? If Samsung takes too long to release this in America can I buy the UK version and use it in the US?
Thanks
Click to expand...
Click to collapse
I bought an unlocked international/Euro Galaxy Alpha SM-G850F at the London Samsung store... Installed my USA ATT SIM and have no prob w. calls or H or H+ data but can NOT get LTE band in the USA on either ATT or TMO even though the device seems to have the right bands for ATT or TMO LTE. On advice from an ATT Wireless store manager, I updated my APN settings to match ATT setup but still did not get LTE. FYI my H+ is quite fast for most purposes but I want LTE. Hope that answers your question.... Mine is how can I get LTE???
stevensmiami said:
I bought an unlocked international/Euro Galaxy Alpha SM-G850F at the London Samsung store... Installed my USA ATT SIM and have no prob w. calls or H or H+ data but can NOT get LTE band in the USA on either ATT or TMO even though the device seems to have the right bands for ATT or TMO LTE. On advice from an ATT Wireless store manager, I updated my APN settings to match ATT setup but still did not get LTE. FYI my H+ is quite fast for most purposes but I want LTE. Hope that answers your question.... Mine is how can I get LTE???
Click to expand...
Click to collapse
Are you sure the European version has correct U.S. LTE bands? I was under the impression that it does not....
stevensmiami said:
I bought an unlocked international/Euro Galaxy Alpha SM-G850F at the London Samsung store... Installed my USA ATT SIM and have no prob w. calls or H or H+ data but can NOT get LTE band in the USA on either ATT or TMO even though the device seems to have the right bands for ATT or TMO LTE. On advice from an ATT Wireless store manager, I updated my APN settings to match ATT setup but still did not get LTE. FYI my H+ is quite fast for most purposes but I want LTE. Hope that answers your question.... Mine is how can I get LTE???
Click to expand...
Click to collapse
phositadc said:
Are you sure the European version has correct U.S. LTE bands? I was under the impression that it does not....
Click to expand...
Click to collapse
Originally Posted by sirobelec
GSM Arena says this about the device:
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 900 / 1900 / 2100
4G Network LTE 800 / 850 / 900 / 1800 / 1900 / 2100 / 2600
If what wikipedia says, AT&T uses the following frequencies:
2G: 850 / 1900.
3G: 850 / 1900.
4G: 700 block B (main frequency) / 1700 AWS / 1900 / 2300.
So, if I read correctly, you can use the international Alpha for 2&3G, but for LTE, you are covered only by one LTE band, 1900, and this being not a main frequency, won't have good coverage everywhere, I think.
I am trying to solve this also.
I think that the Euro Version with the Exynos does not have the proper LTE Bands for North America LTE.
But the Qualcomm version does, though not sure about
TMobile.
I am looking at this from Canada GSM for $ 549. Factory Unlocked with following Bands:
2G Network GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 900 / 1900 / 2100
4G & LTE 2100, 1900, 1800, 1700, 2600, 700, 850
Obviously for AT&T you just buy theirs.
I have read that the EXYNOS versions do not function in North America on LTE.
With all phones it seems that you must be very very
Specific about Model Numbers including Suffixes etc.
Especially SAMSUNG loves to make 24 versions of ALPHA, 50 versions of S4 etc.
Frequency Bands are a real WTF for amateurs like me:
For example are there TWO DIFFERENT 1700 bands, one for4G LTE and one for 3G , HSPA + or are they the SAME BAND with dual usage ?
In example ABOVE the Alpha Factory Unlocked Canada GSM @$ 549.
IF used for TMobile the LTE Bands look fine, but the 3G
1700 Band is not there. Will 3G merely use the 1700 LTE
band or does the SOC ( QUALCOMM) need to have
allocated the 1700 band for dual usage LTE and.3G
?

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