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I have a Samsung Galaxy S4 Mini from Verizon (Model SCH-I435). My boss gave it to me since I needed a new phone and to my surprise, it was unlocked and I was able to get it working with ATT. My only problem so far is that the data speeds are not what I was expecting. I only get 2mbits/s when compared to my company phone (which is verizon) gets 10mbits/s. My thought was that the phone could did not support ATT's 4g/LTE network but from all my research, it looks like it should. When testing the speed or using data, it shows shows "H+" at the top of the screen.
Here is a list of supported networks from Samsung's website for the SCH-I435
Frequencies and Data Type Digital (CDMA/PCS)/1x, EVDO Rev A; Global(GPRS/EDGE/GSM(850/900/1800/1900); HSPA/UMTS(850/900/1900/2100), LTE (Band 13, Band 4)
Judging from wikipedia, Att uses band 4 and it says the phone supports band 4 so I do not get why it is not going faster. Any help would be appreciated.
You need to have LTE enabled in your AT&T account otherwise it won't let you connect with the LTE APN settings (you'll need to make sure you have the LTE APN in the phone as well).
I brought back a Pro 2 F350L from Korea because it was listed in swappa as the Att device unlocked. I took it to T-Mobile put in a sim card which automatically chose the appropriate apns. I only get 3g no lte. I have scoured the web and these forums but cant find the info that tells me wether i got the wrong device for Tmo bands. I need help either configuring the correct bands or correct radio to flash or if this device won't or can't get lte on Tmo network. I am more than happy to reward the parties or person who helps me figure out this problem. If i have the wrong phone then so be it i will get the other model (that gets tmo lte) and unload this F350L. Thanks for any and all help.
In network mode, do you have GSM/WCDMA/LTA auto to select, or just GSM/WCDMA auto?
Service Menu:
Preferred Network Mode: gsm/wcdma/lte
dejop said:
In network mode, do you have GSM/WCDMA/LTA auto to select, or just GSM/WCDMA auto?
Click to expand...
Click to collapse
Yes:
Preferred Network Mode: gsm/wcdma/lte AUTO
I have found the bands for my F350L
LG G PRO 2 F350L
WCDMA- 2100/1900/850, GSM- 900/850/1800/1900 MHZ, LTE- 1/5/3/7/17
wiseguyy said:
I have found the bands for my F350L
LG G PRO 2 F350L
WCDMA- 2100/1900/850, GSM- 900/850/1800/1900 MHZ, LTE- 1/5/3/7/17
Click to expand...
Click to collapse
Looks like you have the wrong phone ... https://support.t-mobile.com/message/435224#435224
Bottom line, for optimal utility a T-Mobile phone needs to be:
1. Quad-band GSM
2. HSPA+ on at least band 2, band 4 & band 1 (2100) for roaming.
3. LTE on bands 1, 2, 4 & 12.
TSF14 said:
Looks like you have the wrong phone ... https://support.t-mobile.com/message/435224#435224
Bottom line, for optimal utility a T-Mobile phone needs to be:
1. Quad-band GSM
2. HSPA+ on at least band 2, band 4 & band 1 (2100) for roaming.
3. LTE on bands 1, 2, 4 & 12.
Click to expand...
Click to collapse
Thanks for all your help Ill post it up on Swapa this weekend.
TSF14 said:
Looks like you have the wrong phone ... https://support.t-mobile.com/message/435224#435224
Bottom line, for optimal utility a T-Mobile phone needs to be:
1. Quad-band GSM
2. HSPA+ on at least band 2, band 4 & band 1 (2100) for roaming.
3. LTE on bands 1, 2, 4 & 12.
Click to expand...
Click to collapse
So seeing the bands I posted would the phone work for ATT? Thats a huge question because it (350L) is posted on Swappa a a ATT phone? At least I can unload it there, LOL.
wiseguyy said:
So seeing the bands I posted would the phone work for ATT? Thats a huge question because it (350L) is posted on Swappa a a ATT phone? At least I can unload it there, LOL.
Click to expand...
Click to collapse
"AT&T 4G HSPA and HSPA+ use 850Mhz(Band 5) and 1900Mhz(Band 2) bands but it all depends on area if they own a license. LTE uses Band 17(700Mhz), Band 5(850Mhz), Band 2(1900Mhz), Band 4(1700/2100Mhz) currently."
https://forums.att.com/t5/Phone-Device-Upgrades/What-are-AT-amp-T-s-4G-LTE-bands/td-p/4067288
My F350S gets LTE on AT&T.
TSF14 said:
"AT&T 4G HSPA and HSPA+ use 850Mhz(Band 5) and 1900Mhz(Band 2) bands but it all depends on area if they own a license. LTE uses Band 17(700Mhz), Band 5(850Mhz), Band 2(1900Mhz), Band 4(1700/2100Mhz) currently."
https://forums.att.com/t5/Phone-Device-Upgrades/What-are-AT-amp-T-s-4G-LTE-bands/td-p/4067288
My F350S gets LTE on AT&T.
Click to expand...
Click to collapse
So the F350S works on ATT and here are Your Phones Bands (as listed here on XDA)
LG F350S
WCDMA - 2100/1900/850, GSM - 900/850/1800/1900 MHz, LTE - 1/5/3/7/17
So will these Bands work with T-Mobile? I really love this device and I am totally hooked on the 5.9 inch screens color so I am hoping your ATT Model (The one your using) will work on T-Mobile? If it does I am more than happy to send you a few duckets
TSF14 said:
Looks like you have the wrong phone ... https://support.t-mobile.com/message/435224#435224
Bottom line, for optimal utility a T-Mobile phone needs to be:
1. Quad-band GSM
2. HSPA+ on at least band 2, band 4 & band 1 (2100) for roaming.
3. LTE on bands 1, 2, 4 & 12.
Click to expand...
Click to collapse
So will this model and bands shown below work on T-Mobile and get roaming and LTE as well?
LG F350S
WCDMA - 2100/1900/850, GSM - 900/850/1800/1900 MHz, LTE - 1/5/3/7/17
So will these Bands work with T-Mobile? Again I am more than happy to send a few duckets $ for your help getting to the bottom of my queries!
wiseguyy, I believe the phone must have band 2 and/or 4 for it to utilize TMO's LTE service. From what I've read, band 1 is used only for roaming. Read the entire thread you quoted above.
12. Re: Refarm and 4G LTE - what are the final frequencies
tmo_sean_l
Citizen Magenta
tmo_sean_l Nov 29, 2014 12:54 PM (in response to memn1)
Great discussion everyone For the most up to date info regarding our network and devices memn1 you'll want to review these links: Setup guide to Bring Your Own Device (BYOD), http://support.t-mobile.com/community/coverage/blog and http://how-to.t-mobile.com/4g-lte/, and Newsroom | T-Mobile Newsroom
Hey guys i hope maybe someone here can shed some light on this problem for me.
I bought a sm-g920i international unlocked s6 used lovally here in Alberta Canada. This sm-g920i says its compatible with LTE bands1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 26, 28, 40
And my carrier is Bell Mobillity which has bands 4, 7, and 17.
So i noticed that my LTE usually only has 0-1 bars but if i put my sim in my s4 or s5 it always had way more. So i then went and got a new sim and tbis did nothing, i tried a feiends sim from his s6 that had full bars and as soon as he put in in mine it went to 1.
So i then starded doing speed tests using the speedtest.net app and noticed my s6 was getting about half the speeds or less than my s5 on same network and same area and same time. The odd thing is every now and then it will get to full bars and i got a 53mb download speed on LTE. But most of the time it shows 0-1 bars and less than normal speeds.
So the i figured out that when i turned off LTE the bars went up instantly to normal like my other phones.
So i contacted samsung support and we have been emailing back and fourth and they wanted screenshots of the rf debug screen and all that stuff and they came to the conclusion that because i get full bars on h or h+ there is nothing wrong with my device and jt is a carrier issue or the device is not compatible. But the calling bell and doing all the research shows that it should be fully compatible with bell?
So me paying attention to the rf debug screen now i notice it goes from band 2 to band 4 and back and fourth but always with 1 or 0 bars untill i get to a certain spot and it skyrockets and then drops right off again. All the while my note 5 had 4 and 5 bars the whole time.
So i took a tonne of screen shots of the rf debug screen so they can see what its doing and emailed it back to them also with some from my note 5 to compare too and thats where i am now.
He seemed to think because i was connected to band 2 that was my problem but then it connected to band 4 and same problem.
Also i noticed my note 5 connects to band 2 when it shows LTE+, it shows band 4 but then on the bottom a few more lines pop up and it shows band 2 in there.
But bell only has bands 4, 7 and 17 so now im really confused and i dont know what to do with this phone.
I already bought this note 5 which i love and it works perfect on my network just like my s5 and my s4 did, but id like to solve the problem with this s6 or at least know there is nothing wrong with it and i just need tk sell it to soneone who has the proper network for it.
I can provide any of the screen shots if needed and ill paste his last email below here. Any help would be appreciated thanks
Email:
Dear Mr. Scott,
After reviewing this case very detained in order to provide you the more clear explanation I have issue this conclusion base on the evidences you have provided and the research we did perform base on your mobile carrier technology.
The Model SM-G920i is the Galaxy S6 version specific for LATAM (Latin America). Its SW embed the LATAM Carrier singularities to optimize and guarantee customers the best experience. The Differentiation letter in this model indicates the specific marked is has been programed for.
Your unit is not an exception. It is a LATAM version of Galaxy S6.
Based on our research this is Bell Mobility LTW Specs:
**picture of bell network info from wikipedia**
https:// en.wikipedia.org/wiki/ Mobile_country_code
This is your phone LTE Service reading while signal is low:
**my screenshot of rfdebug screen showing band 2**
Your Galaxy S6 Edge is connecting to Band 2 (1900 MHz) which is probably not even supported by your service provider on this area as per the chart since it stated Bell Mobility supports only LTE B4 (1700 MHz) and B7 (2600 MHz).
Also, you may be probably roaming with a 3rd Mobile carrier which (for LTE) which its MCC / MNC (Mobile Country Code / Mobile Network Code) is not registered on GS6 Edge MCC / MNC database.
Samsung Galaxy S6 Edge supports the following Bands:
2.5G (EDGE, GSM/GPRS ) MHz:800, 900, 1800, 1900
3.5G (HSPA+, UMTS/WCDMA ) MHz:850, 900, 1700, 1900, 2100
4G (LTE ) Bands:1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 26, 28, 40
As you can see, Band2 is fully supported by the mobile unit but RSSI (Received Signal Strength Indicator) -89 which is the number for 1 bar on signal indicator (Full Bars <-60 and No Bars > -95). This is, if phone is getting the full signal for 3G (H, H+) phone antenna circuitry is properly working but when switches to LTE signal goes low. This absolutely discards is a phone issue.
Your actual network uses IMSI (International Mobile Subscriber Identity) to roam across the nation with carrier 302 / 880. This is why it is very important where are you using your S6 Edge since carrier 302 / 880 only provide 3G services. This is also another important thing to consider since, IMSI validates your MCC/MNC and phone number to roam across the nation. This is, if your IMSI is not registered on LTE sharing partner database you will be rejected whenever the units negotiates access to the external/shared network, thus, an alternative LTE network need to be camped for (B2) which is not the main. This is probably reason why your friends SIM operates OK when uses your galaxy S6 edge. This is not a mobile units negotiation. This is IMSI / Carrier1 / Carrier 2 negotiation.
This is carrier2 info (the secondary operator that provide the shared service (NOT LTE).
As you can see on the chart, 302 / 880 is only 3G (UMTS 850 / UMTS 1900). This is, if you are operating in an area where services is provided by Carrier 302 / 880 (shared service) you will be able to get the 3G service only. Even though your LTE service is turned ON on the phone.
I expect this is information remains useful for you.
My regards,
Jabaar Anglin
Samsung Electronics
***** im not sure i understand what he is sayibg in this email totally. But part of it he is talking about telus which is who bell shares towers with. He thibks they only have 3g but just to be clear twlus mobillity has 4g LTE
Bump any info greatly appreciated
Hello,
I've got a LG Phoenix 2(K371) phone that I bought from Bestbuy and unlocked through AT&T
The phone is supposed to support the UMTS B1(2100 Mhz) frequency (as stated in specs).
I'm in North Africa right now for a business trip and unfortunately I wasn't able to get any 3G data with the local carrier that uses the UMTS 2100 Mhz frequency, I'm stuck with only 2G while my other phone works just fine.
I tried to change my Network Mode from 4G to 3G but the Network mode menu is missing!!!!!!
My questions are:
1- Does the K371 really supports the UMTS 2100 Mhz frequency ?
2- How can I change my Network mode from 4G/Lte to 3g/WCDMA?
Thanks
Did you ever get this sorted out? I am in Germany and can only get 2G also.
Same here in the UK! Only 2G.
My understanding is that either the official specifications of the phone are wrong - it doesn't support the HSDPA frequency of 2100 MHz, or (most likely) this frequency is disabled in the phone software settings since [email protected] doesn't use this frequency in the US. In any case it is very frustrating: I bought this phone convinced it is going to work while I am travelling in Europe, but obviously it doesn't as 2G data connection is useless.
Same problem in SE Asia. Phone doesn't have the right LTE bands but HSPC should work. Only getting 2G. No option in the hidden menu to change the modem RAT settings that I can see. *#546368#*371#
Anyone have any luck using the k371 overseas?
Same here...
I tried every single method I know in hopes that I could root the phone, but no luck!!!
I believe at&t disabled the said frequencies....
Our only bet is a proper root, and a custom rom..
any update on no UMTS 2100Mhz?
any solutoion on this issue?
I have found a solution. I am using it outside the US. I contacted my cellular provider, gave them the phone name (LG K371) and they sent me a text message with automatic settings for their data network. As soon as I opened it, I got a message like "data settings have been updated" and now it works on 3G and 4G without any issues. You may also be able to find these data configuration settings on your cell service provider's web site.
Seriously???
Please let me know is it AIRTEL service? since i am from INDIA.
we have the same problem in 2 mobiles..
Hmmm
I tried of calling and received setting for MMS , GPRS, INERNET but still i m seeing 2G symbol as E - edge detection
Please help me
Hi this is sainath
am also facing same problem, any one got solutions
please give reply.
tromal said:
Hello,
I've got a LG Phoenix 2(K371) phone that I bought from Bestbuy and unlocked through AT&T
The phone is supposed to support the UMTS B1(2100 Mhz) frequency (as stated in specs).
I'm in North Africa right now for a business trip and unfortunately I wasn't able to get any 3G data with the local carrier that uses the UMTS 2100 Mhz frequency, I'm stuck with only 2G while my other phone works just fine.
I tried to change my Network Mode from 4G to 3G but the Network mode menu is missing!!!!!!
My questions are:
1- Does the K371 really supports the UMTS 2100 Mhz frequency ?
2- How can I change my Network mode from 4G/Lte to 3g/WCDMA?
Thanks
Click to expand...
Click to collapse
Sorry for a late reply, but here's the real scoop about the LG K371 (AT&T)
First, being a "cheap" LG phone, there are very few bands actually included, and they only cover the main (not all) AT&T US frequencies, therefore it's no surprise that doesn't work on all overseas carriers. Again, they are covering only major US bands, and despite what it shows on the box or specs it may not be always true. B1 (2,100Mhz) band has different sub-bands, therefore it doesn't mean that the US B1 will work on an overseas B1, let alone the air-interface (2G/3G/4G/LTE) may not all be supported even if this sub-band exists.
Second, being that it's an AT&T phone, they are knows to load firmware with major restrictions for band selection called RAT Restrictions, which cannot be undone unless you can reflash it with a non-customized firmware, but you can't do that either due to the locked bootloader. A better option is to always go with the un-customized or Tmobile K7/K8 because they always have a lot more bands enabled than the AT&T version. Better yet, go with a Samsung which have more bands even on the AT&T models.
Bottom line, "cheap" phones along with AT&T restrictions will not work everywhere, despite the specs, and there's nothing you can do about it.
And my favorite old adage is "You get what you pay for!" LOL
I bought an M8 last month and with a luck like mine I got a Verizon variant.
The problem is it won't connect to 2g networks ( connects to 3g and 4g networks fine. )
First I thought Verizon variant won't be supporting GSM or 2g networks but I did my research and found that it supports GSM networks. My network gives excellent coverage for 2g in my area . My network's 3g and 4g coverage is really poor in my area so I am left with 2g only. If I set it to global mode, it will connect as long as 3g or 4g signals are available but will go on limited service once there are no 3g or 4g signals.
In network settings if I select GSM only it does not work. The network mode remains unchanged . All other network modes can be selected but not GSM only.
Even by dialling *#*#4636#*#* I can't select GSM only.
If I set it to GSM/UMTS/LTE it will connect to only 3g or 4g but will show limited service once there are no 3g or 4g signals .
I have tried a patch for Verizon phones with no 2g options but still no use.
It would be nice if I could any help what could be the problem.
It can't be hardware related because if the modem is damaged then 3g and 4g should also not work.