Develop Bugs

3G on Straight Talk

I have CM7 loaded, but doesn't really matter what rom I load, I can't seem to get 3G data speeds. I am getting internet, so that tells me the APN is setup correctly, just not 3G. Any thoughts?
Jason

probably need to look into a different radio

Any ideas? I tried 3 different ones!
Sent from my HTC Vision using XDA

The model I have is A7272 and I have an AT&T sim. Do you think the sim tells the phone what band to use for 3G? They have the option of a T-mobile sim, does anyone think that will work?

look up the A7272 on gsm arena to see what 3G band it supports and cross reference it with ATT's 3G band
Sent from my Desire Z via XDA App

I think it was because I had an ATT sim. I got a T-mobile sim and now I'm getting "H" everywhere. Still doesn't seem as fast as Verizon's 3G, but for $45/month I can't beat it. So the A7272 supports HSDPA 900 / 2100, is that why with the T-Mobile sim I can get H, because they have a 2100 HSDPA Frequency?

AT&T uses the 850/1900 spectrum for 3g and the 700mhz spectrum for 4g.
Since your phone supports none of those, that's why.
T-Mobile uses 1700/2100 (requiring both) or 1900 for 3g/4g. now, you only have half of the 2 spectrum requirement so you probably only have "half" 3g. Tmobile uses one spectrum for upload and one for download. I don't know which one is which, but if you only have one, that means you'll only get 3g/4g speed on either uploads or downloads, but not both.

I guess I fell into this trap as well... I bought a desire z thinking I could use 3g on it with my ATT/Straight talk sim. After unlocking and re-roming, I now see the same issue, stuck on Egde, and really slow edge at that.
jch2os, did you see a difference in your service area/call quality switching to the tmobile sim? I've been really happy using an Inspire on Straight talk with ATT's network, do you feel the tmobile service is a downgrade from what you previously had with ATT/Straight talk?
Thanks for the info!

After some research via eBay and Amazon, it turns out that there is two versions of the Desire Z. There is the A7272 which supports the WCDMA 900/2100 MHz bands and the A7275 which supports the 3G 850/1900 MHz bands.
idenlover, if your device is getting EDGE on the Straight Talk sim that runs on AT&T's bands, your device is the A7272 and you should get the T-Mobile Straight Talk sim. I myself am a G2 user on T-Mobile and I can say service and calling is pretty much crystal clear except in school, where there are numerous concrete buildings. Then again, I'm based in Miami, FL so I wouldn't know how service would be on your end. I hope this helps!

if you want AT&T you need the A7275 from bell canada.

Hi all! Look like i have the same problem. I have Desire Z from Russia - with russian symbols in a hard-keyboard. And in FIDO network i have only EGDE signal - never 3G. My question: what a part of phone i need change? Antenna? GSM-module? or something other? Please don't advice me change the phone - i need this keyboard, with russian symbols!!! )
P.S. If anybody know solution this problem in software (any radio, ROM, or etc.) - please, answer me too. I don't want a lot open the phone and change any parts, only if this really needed. )
P.P.S. If it important - my h-boot is 0.84.2000.

Thread moved to Q & A section.

Create a separate thread so more people can help
Sent from my HTC Vision using xda app-developers app
---------- Post added at 04:17 AM ---------- Previous post was at 04:14 AM ----------
From what I get from your problem is that your phone doesnt support the FIDO network 3g bands. I think that is hardware locked. Hopefully somebody can chime in
Sent from my HTC Vision using xda app-developers app

help! straight talk edge BS!
idenlover said:
I guess I fell into this trap as well... I bought a desire z thinking I could use 3g on it with my ATT/Straight talk sim. After unlocking and re-roming, I now see the same issue, stuck on Egde, and really slow edge at that.
jch2os, did you see a difference in your service area/call quality switching to the tmobile sim? I've been really happy using an Inspire on Straight talk with ATT's network, do you feel the tmobile service is a downgrade from what you previously had with ATT/Straight talk?
Thanks for the info!
Click to expand...
Click to collapse
add another one to the list. how did you fix your problem, if at all? this stupid edge crap is garbage.

[Q] Which one to get? Which version uses what bands?

My S3 mini broke. Now I thought to get an S4 mini, but I can't figure out which one would be the right one.
I am using a plan in the US, ultra mobile, which is on the T-mobile network I think. I also often use my cellphone
abroad with other sim cards. I've seen that there is a 16GB version available - SCH-I435 from Verizon.
I can't figure out what bands this phone uses.
http://en.wikipedia.org/wiki/Samsung_Galaxy_S4_Mini has no info on the bands.
http://www.samsung.com/us/mobile/cell-phones/SCH-I435ZKAVZW-specs says:
LTE: Bands 4/13 CDMA 1x/EVDO Rev A. 850/1900 MHz.
Are there any other 16GB versions? What about root/rom? Any significant differences? Which would you recommend?

Its more like do you want LTE or 3g support, any international unlocked version will support all bands
Afaik verizon its CDMA and dont use a sim card therefore can't switch sim

fburgos said:
Its more like do you want LTE or 3g support, any international unlocked version will support all bands
Afaik verizon its CDMA and dont use a sim card therefore can't switch sim
Click to expand...
Click to collapse
I see. That would be bad. So the verison one can not switch SIM? Which means it can't be used in europe?
This post implies that there is some kind of SIM on the SCH-I435. But I don't exactly understand what works and what doesn't.

ghostwheel said:
I see. That would be bad. So the verison one can not switch SIM? Which means it can't be used in europe?
This post implies that there is some kind of SIM on the SCH-I435. But I don't exactly understand what works and what doesn't.
Click to expand...
Click to collapse
Well Im really not sureim not in the us, but I remember a friend had a Verizon phone and can't be enabled in my country because didn't have Sim slot and all carriers have Sim buy was months ago that could have changed

If the info is of any help, I have a GT-I9195 model (currently connected to Spark, NZ) that claims to have 16G of memory and, in this case at least, is unlocked. It takes a mini-SIM, but that's not unusual now days.
Given that most phones in NZ are sold unlocked and people expect to be able to swap SIMs from one phone to another as well as take their current phones to another network, I'm guessing it supports most bands.

Mike_NZ said:
If the info is of any help, I have a GT-I9195 model (currently connected to Spark, NZ) that claims to have 16G of memory and, in this case at least, is unlocked. It takes a mini-SIM, but that's not unusual now days.
Given that most phones in NZ are sold unlocked and people expect to be able to swap SIMs from one phone to another as well as take their current phones to another network, I'm guessing it supports most bands.
Click to expand...
Click to collapse
Thank you! I'll get that model then.

[Q] Data from both sim cards?

I am in search of a dual sim phone, and I consider the zenfone 2 a good candidate.
However, it is vital to me that the phone can support a data connection from both sim cards.
Obviously not at the same time, but to switch data connection from one sim card to the other, without having to physically change the sim cards around.
Is this possible on the zenfone 2?

ASW1 said:
I am in search of a dual sim phone, and I consider the zenfone 2 a good candidate.
However, it is vital to me that the phone can support a data connection from both sim cards.
Obviously not at the same time, but to switch data connection from one sim card to the other, without having to physically change the sim cards around.
Is this possible on the zenfone 2?
Click to expand...
Click to collapse
This is possible but sim2 only supports 2g speeds.

lordpipa said:
This is possible but sim2 only supports 2g speeds.
Click to expand...
Click to collapse
Thanks, that's quite a disappointment.
I thought today most other dual sim phones do support 3/4G on both sims?

lordpipa said:
This is possible but sim2 only supports 2g speeds.
Click to expand...
Click to collapse
HOW to get that 2G Data service??? We get superfast 2G Service from our operator (!dea Cellular in India)

Dhanuhammer said:
HOW to get that 2G Data service??? We get superfast 2G Service from our operator (!dea Cellular in India)
Click to expand...
Click to collapse
AFAIK there is no data from sim2, not even 2G

ASW1 said:
I am in search of a dual sim phone, and I consider the zenfone 2 a good candidate.
However, it is vital to me that the phone can support a data connection from both sim cards.
Obviously not at the same time, but to switch data connection from one sim card to the other, without having to physically change the sim cards around.
Is this possible on the zenfone 2?
Click to expand...
Click to collapse
.
You will not get data on sim 2 due to Asus blocking it with their firmware. Even though they used an outdated and subpar modem for sim 2, it is still capable of data. Their Zenfone Selfie does contain a dual active dual sim with lte on both sims this their "flagship" phone however used inferior hardware.
Unfortunately this may not be the phone for you in particular if you live in an area such as the U.S. or in Europe where they are shutting down 2G, it's already happening. This "flagship" dual sim phone will soon become a single sim for many of us.
I've actually talked to Asus about this and was told this is their "Flagship" phone and it is "Premium LIKE". I asked what he meant by "Premium Like" and he said it was comparable to other high end phones with compromises made on using lessor hardware. LOL, it's a knock off then, no different than buying "Prada" bags out of someones car trunk. I've had to deal with Asus on a couple of issues with their phone and have to say, I would NEVER buy anything again from them.

International Note 5 N920i on AT&T

Because I hate the idea of having a neutered AT&T Note 5, I bought an international variant (N920i). It appears the LTE bands are all compatible between the two. I will let everyone know how it turns out. If you already have experience with this, let me know.
EDIT: Yes, N920i works without any modification on AT&T

When does it arrive?
Thats very interesting.
from my SAMSUNG-SM-N920A using XDA Free mobile app

First half of this week hopefully!

Please keep us posted.

@alaskajoel Le us know if you have any signal issues.
The T Mobile S6 Edge on AT&T network gave me some issues. Calls would take 30 seconds to dial out and phone did not ring a bunch.

martinezma99 said:
@alaskajoel Le us know if you have any signal issues.
The T Mobile S6 Edge on AT&T network gave me some issues. Calls would take 30 seconds to dial out and phone did not ring a bunch.
Click to expand...
Click to collapse
Will do. Should be in my hands tomorrow.

Here goes. N920i 64GB
EDIT:
LTE Working with attnextgenphone APN. Made a few phone calls, received one, and so far no odd problems.

I don't see the LTE on the signal bar are you sure it's on LTE?
---------- Post added at 05:02 PM ---------- Previous post was at 04:48 PM ----------
May I ask where you purchased this version?

eroracing said:
I don't see the LTE on the signal bar are you sure it's on LTE?
---------- Post added at 05:02 PM ---------- Previous post was at 04:48 PM ----------
May I ask where you purchased this version?
Click to expand...
Click to collapse
LTE showing up on the signal bar is a Domestic device visual. International versions Show E (edge) 3G, H+ (Faux G) and 4G for LTE.
If you are still unconvinced, my service mode presently shows I am on LTE Band 4. Download speeds at 40mbps this evening. No carrier aggregation unfortunately, but I also didn't have it on my Nexus 6 or the GS6.
I purchased the phone from a seller in Hong Kong via Ebay.

Awesome! Enjoy!

Yep, just like the International S6 G920I that supported AT&T LTE
Sent from my SD4930UR using XDA Premium 4 mobile app

This is excellent news. How much did you pay for that bad boy? Please go to dev settings and see if "allow OEM unlock" is in the options. Thank you.

seh6183 said:
This is excellent news. How much did you pay for that bad boy? Please go to dev settings and see if "allow OEM unlock" is in the options. Thank you.
Click to expand...
Click to collapse
~$900 USD. OEM Unlock is an available option in Developer Options.

I thought I'd give this thread a small bump as I'm about to pull the trigger on an international N920I as well.
My question stems from simply being new to importing phones and having to pay attention to bands. I have bene following this thread closely, and it seems as though the N920I performs well on the AT&T network, but is it the same as if I had bought one from AT&T? I ask only because it was just mentioned that this phone does not have Carrier Aggregation.
I'm not certain what carrier aggregation is (I looked it up on google but couldn't find much to answer my question). Does this mean that it will perform more slowly on US networks?
Also a final question, if anyone is willing to answer it. What is the region-locking situation on this phone? I have read mixed reports about people being stuck with phones that they cannot use because it was not activated with a compatible SIM, and some people that say they have had no problem. I don't want to drop $900 on this device and not be able to use it.

Diraan said:
I thought I'd give this thread a small bump as I'm about to pull the trigger on an international N920I as well.
My question stems from simply being new to importing phones and having to pay attention to bands. I have bene following this thread closely, and it seems as though the N920I performs well on the AT&T network, but is it the same as if I had bought one from AT&T? I ask only because it was just mentioned that this phone does not have Carrier Aggregation.
I'm not certain what carrier aggregation is (I looked it up on google but couldn't find much to answer my question). Does this mean that it will perform more slowly on US networks?
Also a final question, if anyone is willing to answer it. What is the region-locking situation on this phone? I have read mixed reports about people being stuck with phones that they cannot use because it was not activated with a compatible SIM, and some people that say they have had no problem. I don't want to drop $900 on this device and not be able to use it.
Click to expand...
Click to collapse
My data speeds and reception have been the same as my nexus 6 and girlfriend's GS6 (purchased from AT&T.) Carrier aggregation allows for next generation LTE, but I have yet to own a phone, AT&T branded or otherwise, that supports it in my area. It might just be that there is no support for it in my city, but I'll be in Chicago In a few weeks and will try to investigate it there.
I can't speak to the region locking. All I know is my phone was completely sealed and worked 100% right out of the box with only putting in an AT&T SIM card.

alaskajoel said:
My data speeds and reception have been the same as my nexus 6 and girlfriend's GS6 (purchased from AT&T.) Carrier aggregation allows for next generation LTE, but I have yet to own a phone, AT&T branded or otherwise, that supports it in my area. It might just be that there is no support for it in my city, but I'll be in Chicago In a few weeks and will try to investigate it there.
I can't speak to the region locking. All I know is my phone was completely sealed and worked 100% right out of the box with only putting in an AT&T SIM card.
Click to expand...
Click to collapse
Thank you for the quick reply. I think I'll put in an order right now.

Samsung Pay
I'm glad to hear that the N920I works on AT&T on the LTE band. I considered getting the International version. However, there is something else that I am concerned about...and that is Samsung Pay that will be coming late September. I believe carriers have to allow (or configure) Samsung Pay to work. For example, Verizon may not be supporting it, at least that's what's traveling around the net. Also when I had the International Galaxy S3 on AT&T, Google Wallet didn't work, it only worked on AT&T versions at that time. Unfortunately, we won't know until Samsung Pay is available, but I wonder if it will work on the N920I?

Awesome news. can you please tell me if VOLTE works on AT&T or if you even had the option for HD calling? Settings should be found under data options.
Thanks in advance.

For those wondering, if you use an N920I on AT&T, there are a few things you should know.
1. Since this is an international model, the signal indicators are different than what we're used to seeing in the US. The SM-N920I shows the following indicators for mobile data:
E - This means you have a 2G/EDGE connection
3G - This means you have a UMTS connection with no HSPA
H+ - This means you have an HSPA+/Faux 4G connection
4G - This means you have an LTE connection
2. Phone calls will not work over LTE (VoLTE), and, by extension, HD Voice doesn't work either. The VoLTE and HD Voice components are proprietary software that is only built into the AT&T-specific ROM on the SM-N920A.
3. The phone DOES support carrier aggregation (otherwise known as LTE-Advanced), but not on AT&T's bands. Considering that the SM-N920I is intended for retail in Australia, New Zealand, and Singapore, the baseband firmware is tweaked to do carrier aggregation on band pairs that are common among carriers in that part of the world.
So, what does this all mean? If you want a phone that has support for all the bleeding-edge technologies on AT&T's network (VoLTE, HD Voice, LTE-A), then you have no other choice but to buy an AT&T-branded SM-N920A. However, if you want faster updates, no carrier bloat, no carrier branding, an unlockable bootloader, and don't mind sacrificing the whiz-bang stuff on the network side of things, then an SM-N920I will work just fine. Put your SIM card in, you'll get LTE data on all of AT&T's available bands, and you'll be able to make and receive calls over the HSPA+ network. You're just not going to have all the latest carrier-marketed bells and whistles that you'd get if you bought a proper AT&T-branded SM-N920A.
At this point, I *should* rant about how stupid it is that Samsung refuses to sell SIM-free, unlocked versions of their phones via US retail channels. That's what forces us to go through these 3rd party importers to get the international models that aren't really tweaked for the US carriers. Alas, I'm not going to go down that road, though. It's a tempest in a teapot.

oldblue910 said:
1. Since this is an international model, the signal indicators are different than what we're used to seeing in the US. The SM-N920I shows the following indicators for mobile data:
Click to expand...
Click to collapse
Translation: On the 920i/c, the signal indicators follow the international standard of "4G" being "LTE", and not the AT&T/TMO marketing fiction of "4G" being what everyone else calls "3.5G".
As for the rest of your points, I have to wonder how well deployed VoLTE is on AT&T (and I don't think AT&T has even started LTE-A yet, have they?)
I live in a somewhat rural area, and I'm just thrilled I have LTE.. which beats the "no signal" I get with other carriers. I don't know that I've ever experienced VoLTE. (Then again, I can't remember the last time I actually had a voice conversation with my phone.)
oldblue910 said:
At this point, I *should* rant about how stupid it is that Samsung refuses to sell SIM-free, unlocked versions of their phones via US retail channels. That's what forces us to go through these 3rd party importers to get the international models that aren't really tweaked for the US carriers. Alas, I'm not going to go down that road, though. It's a tempest in a teapot.
Click to expand...
Click to collapse
Oh, but why not?! We really need some more activity in the AT&T Note5 section.

Neither sim receiving signal when in dual sim mode only - wileyfox swift 2x

Hi,
Just picked up a Wileyfox swift 2x and am having an issue using it in dual sim mode.
When a single sim is enabled it works just fine but if the second sim is enabled I lose reception for both sims, once I disable one of the sims the other sim then receives reception as normal. Have looked on the forums but cannot see any other users having the same issue so don't know how to progress this.
Have used these sims in a dual sim phone previously without any issue so its clearly a handset rather than an operator issue.
Any help appreciated!

https://forum.xda-developers.com/swift-2

beroid said:
https://forum.xda-developers.com/swift-2
Click to expand...
Click to collapse
Is this a suggestion to post in this forum or is there a thread related to this in this forum?
I have seen the thread related to Dual Sim and the lack of 2G fallback, but that is not related to my issue as both SIMs have previously been used in other dual SIM phones.

rednanor said:
Is this a suggestion to post in this forum or is there a thread related to this in this forum?
I have seen the thread related to Dual Sim and the lack of 2G fallback, but that is not related to my issue as both SIMs have previously been used in other dual SIM phones.
Click to expand...
Click to collapse
That is the forum for your device,Wileyfox Swift 2. Here is a forum for Wileyfox Swift only.

Operating frequency
Hi,
I had a similar problem to this in NZ recently (on Swift model). It happened to me a my phone was not compatible with many frequencies of one of the sim cards I had in. Switched the sim to a more compatible network and now both Sims are behaving well.

trakedogg said:
Hi,
I had a similar problem to this in NZ recently (on Swift model). It happened to me a my phone was not compatible with many frequencies of one of the sim cards I had in. Switched the sim to a more compatible network and now both Sims are behaving well.
Click to expand...
Click to collapse
Thanks for your input.
I ended up returning the phone to Amazon and the replacement phone worked just fine so the issue was obviously limited to that particular phone.

Dual sim problem.
I had similar problem. I used ga giffgaff sim and a Three sim (Hutchinson), but three switched off 2g in my area. TFor calls it was fine, but enabling data caused problems. In the end I removed the three sim.