Here in the US I am using T-Mobile, wich doesn't have 3G yet. So, I probably don't have a 3G sim in my Hermes, and everywhere I go, I always get only a G next to my phone icon. However, when I went to Toronto, Canada, this past week, the G changed to a U. Does that mean:
1) UMTS network was detected, but all it did was detect it, and keep using GSM?
2) UMTS network was detected, and I was able to connect to it, because the 3G in a 3G sim cards is for internet access only,
3) the U is for internet connection availability only, and doesn't affect the cell voice phone part of my TyTN?
or
4) I somehow got a 3G compatible SIM card, and had I wanted to, could've been charged $10 every 8 to 10 seconds for downloading REALLY fast (I get charged $10US a meg if I use web outside of USA)
Hello rassah,
In order to have a 3G service you do NOT have ot have a 3G SIM (also known as USIM). The network is backward compatible and will allow you to use whatever your SIM card (or the network) authorized you.
I am also TMO subscriber and in some countries I could use UMTS and in others only 2.5G (GPRS/EDGE). Technically you have no limitations to do so so its up to the commercial arrangements between TMO USA and the other operators.
So the bottom line:
a. Your device detected UMTS and the network allowed your device to be attached to the 3G network (hence you saw the "U").
b. You probably have a SIM and not USIM (like you mentioned TMO still does not have 3G network ready for commercial use).
c. It is perfectly OK technically to connect to a 3G network even if you have 2.5G SIM card (pending you are authorized by the network to get such a service).
You can do a simple test next time you are in Toronto or other place where you see the "U". Go to www.dslreports.com, they have speed tools, try to perform a speed test and if you are connected with "U" you should get 3G speed results (again, depends on the network and the quality of the signal.. you will see a result of something between 200k to 300k i would guess)
PS: You are right about the cost per meg. But look at the 3G speed as you get what you want but just faster so the bottom line is - you are being charged the same as 2.5G just get work done sooner
Would the sim card from a HTC Tilt (3G) work in say a Razr(non 3G phone)?
The 'phone must be hardware equipped with 3G.
The SIM then provides the 3G software functionality if the service provider has that equipment installed in its cells-and not all do (esp. the 'budget SPs)
Ashley
I know the non 3G phone wont have 3G speeds. I just don't want to have to get another sim card when I switch phones. One is 3G and the other is not.
1jaxstate1 said:
Would the sim card from a HTC Tilt (3G) work in say a Razr(non 3G phone)?
Click to expand...
Click to collapse
should be compatible unless the Razr locked to a certain telco.
3g work depends in network and celphone not in simcard.
I am using my 4year old postpaid simcard from my himalaya to non-wm 3g phone, works fine.
My new simcard(3g printed on card) works with my himalaya(non-3g)
3G sim cards direct the phone to access the 3G network (UMTS) if the phone is so equipped with 3G compatibility. If a 3G sim card is placed in a 2G (GSM/GPRS) phone it simply provides the phone with the 2G network. There is no need for different SIM cards.
Conversely, a 2G SIM in a 3G phone can only provide the 2G network access so if you are after something like Streaming Video and you have a 2G SIM, this would be your problem
* Service issue hint. If your service went "bye-bye" after you bought a 3G phone it could be because you are on a fringe 3G area and the phone defaults to 3G network even if there is a strong 2G signal in the area. A workaround for this is to hunt up an old Cingular 64k 2G SIM that has not been used on Ebay or someplace like that and use it in your phone. You will lose the 3G network access but will have your old 2G network access again.
** The exception to the rule would be certain older model Nokia phones that show a phone restriction upon placing the 3g SIM in the phone (No, entering a restriction code does not clear the restriction)
Hi Everyone,
I'm usually just a reader on XDA, but I have found a problem that appears not to have been solved and wondered if anyone had any insight.
Problem Summary
When in an area (or network) with only HSPA and UMTS (strong HSPA/UMTS signal, but with no LTE or 2G available), the phone will drop from H+ to 3G erratically, always dropping the data connection. Traditional phone calls are not affected.
Detailed Description
I have a OnePlus Two and have 2 SIM cards. My first SIM Card is with Bell Canada (Virgin), and the second SIM Card is with WIND Mobile Canada.
Neither Bell nor WIND operate a 2G network, so the lowest the service can fall to is UMTS/3G.
Initially, I didn't notice the problem because Bell also operates an LTE network, and there is no problem with dropping the data connections when on LTE.
When I switched to the WIND SIM card (which only operates HSPA and UMTS), I noticed a problem where the phone would initially connect to H+, begin downloading whatever is needed (say, streaming music), but then part way through the download, the connection would switch to 3G, and the data would effectively stop. Within a minute, the service would jump back to H+ and download some more, but this cycle would continue (H+ --> 3G --> H+ --> 3G... ), with no way of knowing 1) how long the H+ connection would last before dropping to 3G (usually less than 30 seconds), and 2) after dropping to 3G, how long before going back to H+. This problem makes the phone almost useless when there is no LTE.
The most obvious troubleshooting I did was move to locations of better signal but I quickly ruled that out, as nothing seems to remove this problem. Other things I tried was to: move locations in the city, reboot phone, hard reset phone, flash most updated version of Oxygen, unlock bootloader, root, try the HSPA Keepalive app, swap SIM1 to SIM2, and many other things.
I originally thought this was a network issue, but I put this WIND SIM in another phone and there was no problem in any way that resembled this problem.
I also ruled out this being a network-specific problem, as I have taken a trip with the Bell SIM to an area where Bell does not have any LTE coverage (only HSPA and UMTS) and the same problem occurs on Bell as with the WIND SIM.
I have found people who had this problem on the OnePlus One tend to recommend using 2G to stabilize the connection, but this is not possible on Bell or WIND. That solution also would not provide adequate data speeds.
Remember this problem only affects data connectivity, as 3G traditional phone calls have no problems.
Question
Does anyone know if there is a way to adjust the conditions when the OnePlus Two will choose to switch from H+ to 3G?
Does anyone have any easier suggestions?
Thank you all in advance, because this rendering this phone almost useless when there is no LTE coverage.
I believe your problem is that phone it's dualsim standby, that means only one modem that alternates signal for both sims, I think normal would be alternating from faster network to slower network on sim without data.
Having to change to g3 between sims theres something stoped in the modem and data connection is also stopped.
You have no problem with voice calls because other sim is automatically turned off and unreachable.
There's nothing you can do if you're forced to only 3g on both sims
By 3g I mean 3g or h+ which to my knowledge are the same
Hope I was helpful and not wrong or more confusing
Sent from my ONE A2005 using Tapatalk
fburgos said:
I believe your problem is that phone it's dualsim standby, that means only one modem that alternates signal for both sims, I think normal would be alternating from faster network to slower network on sim without data.
Having to change to g3 between sims theres something stoped in the modem and data connection is also stopped.
You have no problem with voice calls because other sim is automatically turned off and unreachable.
There's nothing you can do if you're forced to only 3g on both sims
By 3g I mean 3g or h+ which to my knowledge are the same
Hope I was helpful and not wrong or more confusing
Sent from my ONE A2005 using Tapatalk
Click to expand...
Click to collapse
Thanks, I will try disabling the second SIM to see if there is a bug with the dual-sim...
What it currently does with the second SIM is it either shows "R" for roaming or just emergency only, but perhaps there is a software issue so I'll see if disabling the second SIM makes a difference.
biomedeng said:
Thanks, I will try disabling the second SIM to see if there is a bug with the dual-sim...
What it currently does with the second SIM is it either shows "R" for roaming or just emergency only, but perhaps there is a software issue so I'll see if disabling the second SIM makes a difference.
Click to expand...
Click to collapse
Though strange, this workaround fixes the issue. Thank you to fburgos for the suggestion!
So just in case anyone ever finds this issue creeps up on them, the solution is to DISABLE the SIM you are not using. It's not the most convenient workaround to swap SIMs, but the other SIM will be in Emergency Mode, so it really makes no functional difference.
On the technical side, it does appear that there is actually a bug in Android for a very uncommon network configuration. It will only appear in this exact configuration:
SIM1: Network has HSPA/3G only, no LTE or 2G to move to
SIM2: Network also only has HSPA/3G with no LTE or 2G
The non-data SIM does NOT connect to a roaming network (connects with "Emergency Only") - if it connects to a roaming 2G network, this problem does not happen.
The data SIM connects to HSPA/3G
Both SIMs are active
I'm not sure if this will happen anywhere else in the world other than having a WIND Mobile Canada SIM and Bell or TELUS Canada SIM
If anyone has insight on how to report this to Google, or someone else who can confirm my theory, that would be great!
Try this:
1. You need to make sure you have the correct LTE APN selected in mobile networks and LTE as preferred type.
2. Go to dialer and type in this: *#*#4636#*#*
3. Phone Information
4. Set Preferred Network Type to: LTE/GSM (PRL) - you an play with which one you wanna use but the one I said works for sure. on other roms I have" TD-SCDMA, GSM/WCDMA and LTE"
5. Now click TURN OFF RADIO and wait WAIT few secs. will that button turns to Turn Radio ON
6. Now TURN ON RADIO and wait
7. when u see the triangle for the signal is back, at least black , go down and lick SMSC REFRESH then UPDATE.
8. now just go back to APN settings and go into your LTE APN
9. Change Bearer to LTE
biomedeng said:
Hi Everyone,
I'm usually just a reader on XDA, but I have found a problem that appears not to have been solved and wondered if anyone had any insight.
Problem Summary
When in an area (or network) with only HSPA and UMTS (strong HSPA/UMTS signal, but with no LTE or 2G available), the phone will drop from H+ to 3G erratically, always dropping the data connection. Traditional phone calls are not affected.
Detailed Description
I have a OnePlus Two and have 2 SIM cards. My first SIM Card is with Bell Canada (Virgin), and the second SIM Card is with WIND Mobile Canada.
Neither Bell nor WIND operate a 2G network, so the lowest the service can fall to is UMTS/3G.
Initially, I didn't notice the problem because Bell also operates an LTE network, and there is no problem with dropping the data connections when on LTE.
When I switched to the WIND SIM card (which only operates HSPA and UMTS), I noticed a problem where the phone would initially connect to H+, begin downloading whatever is needed (say, streaming music), but then part way through the download, the connection would switch to 3G, and the data would effectively stop. Within a minute, the service would jump back to H+ and download some more, but this cycle would continue (H+ --> 3G --> H+ --> 3G... ), with no way of knowing 1) how long the H+ connection would last before dropping to 3G (usually less than 30 seconds), and 2) after dropping to 3G, how long before going back to H+. This problem makes the phone almost useless when there is no LTE.
The most obvious troubleshooting I did was move to locations of better signal but I quickly ruled that out, as nothing seems to remove this problem. Other things I tried was to: move locations in the city, reboot phone, hard reset phone, flash most updated version of Oxygen, unlock bootloader, root, try the HSPA Keepalive app, swap SIM1 to SIM2, and many other things.
I originally thought this was a network issue, but I put this WIND SIM in another phone and there was no problem in any way that resembled this problem.
I also ruled out this being a network-specific problem, as I have taken a trip with the Bell SIM to an area where Bell does not have any LTE coverage (only HSPA and UMTS) and the same problem occurs on Bell as with the WIND SIM.
I have found people who had this problem on the OnePlus One tend to recommend using 2G to stabilize the connection, but this is not possible on Bell or WIND. That solution also would not provide adequate data speeds.
Remember this problem only affects data connectivity, as 3G traditional phone calls have no problems.
Question
Does anyone know if there is a way to adjust the conditions when the OnePlus Two will choose to switch from H+ to 3G?
Does anyone have any easier suggestions?
Thank you all in advance, because this rendering this phone almost useless when there is no LTE coverage.
Click to expand...
Click to collapse
I have the same problem. Do you already have solved it?
I use only one SIM card so it is not a problem two cards.
really you do not have this problem? if no one knows the solution?
compared with my htc butterfly 2 and another low-end android, one plus 2 running latest Oxygen OS has serious connectivity issues. I compared the signals strength using same sim card in same location (including being connected to the same tower) and One Plus 2 keeps dropping the connection and has really poor signal strength. I have tried the *#*#4636#*#* and tried different network modes, but none of them are helping. Its a real disappointment that the basic feature of this phone is screwed up.
I have tried with CM13 as well. Any ideas if this is a modem version issue?
odeccacccp said:
Try this:
1. You need to make sure you have the correct LTE APN selected in mobile networks and LTE as preferred type.
2. Go to dialer and type in this: *#*#4636#*#*
3. Phone Information
4. Set Preferred Network Type to: LTE/GSM (PRL) - you an play with which one you wanna use but the one I said works for sure. on other roms I have" TD-SCDMA, GSM/WCDMA and LTE"
5. Now click TURN OFF RADIO and wait WAIT few secs. will that button turns to Turn Radio ON
6. Now TURN ON RADIO and wait
7. when u see the triangle for the signal is back, at least black , go down and lick SMSC REFRESH then UPDATE.
8. now just go back to APN settings and go into your LTE APN
9. Change Bearer to LTE
Click to expand...
Click to collapse
Did It.. But it seems like it didn't solve my problem..
So Ive got both my Verizon and At&t sims working however I run into a issue when selecting Verizon as my data provider.
Sim 1 is Verizon (wont allow Verizon in sim 2)
Sim 2 is At&t
Select sim 2 for data and sim one switches 2 "31000" for calls and texts only which is fine. Sim 2 (At&t) handles lte, calls and texts no problem.
Select sim 1 (Verizon) for data and sim 2 (At&t) goes into "no service". Cant make calls, texts or anything.
So basically the only way to get both sims working is to use at&t for data. Problem is my Verizon card has unlimited data. The Verizon data works perfect whether I have 1 sim in or both.
Any ideas?
It's probably because AT&T has decommissioned EDGE service in your area. SIM 2 can only be EDGE when a CDMA (Verizon) SIM is in slot 1 and is being actively used for data. With two GSM SIMs you can have 3G and LTE simultaneously...but not with one CDMA and one GSM. It's a hardware limitation I believe, though I'm not totally sure as it could be a bug too.
Check the AT&T coverage maps to see if your area requires a 3G handset...if so, then your Axon will always show No Service on the AT&T side when Verizon is being used for data.
Yep thats it. At&t shut down 2g on January 1st this year. Thank you.
flyer_andy said:
It's probably because AT&T has decommissioned EDGE service in your area. SIM 2 can only be EDGE when a CDMA (Verizon) SIM is in slot 1 and is being actively used for data. With two GSM SIMs you can have 3G and LTE simultaneously...but not with one CDMA and one GSM. It's a hardware limitation I believe, though I'm not totally sure as it could be a bug too.
Check the AT&T coverage maps to see if your area requires a 3G handset...if so, then your Axon will always show No Service on the AT&T side when Verizon is being used for data.
Click to expand...
Click to collapse
Was this limitation discovered through trial and error or is it actually documented by zte someplace. The limitation about cdma/sim2 edge specifically.
gpz1100 said:
Was this limitation discovered through trial and error or is it actually documented by zte someplace. The limitation about cdma/sim2 edge specifically.
Click to expand...
Click to collapse
ZTE is pretty tight-lipped on CDMA for the Axon 7...originally they claimed they were going to disable it altogether until it got Verizon and/or Sprint approval, which seems to have not actually happened...so they've basically said nothing about it at all, except that it's shown on the specs of the phone.
But anyway, no...ZTE has not stated there's a CDMA-use limitation on SIM 2 for EDGE only...it's just that everyone has seen this occur through anecdotal experience...and we know for sure that simultaneous 3G/LTE is possible with two GSM SIMs so it seems that there is some issue that CDMA creates where UMTS cannot be received concurrent active data use on a CDMA SIM.
A while back I tried a tmobile sim and freedompop (on att) global sim. With tmo on 2g and fp on hspa, the tmo side was constantly disconnecting (I believe we discussed this in one of the other vzw threads). I came to the conclusion that it had something to do with the actual frequencies being used by both sims. Changing the tmo setting to 3g/hspa fixed the problem - likely because it was now operating at different frequencies.
Tmobile's 2g operates at 1900 mhz.
Here in chicago att's 3g network operates on band 5 (850 mhz) and band 2 (1900 mhz).
I believe when it was switching to att 3g band 2 is when the tmo service would cut out.
Verizon's cdma operates at 850 and 1900 mhz and lte bands 2,4,13 (1900, 1700/2100/700 mhz). Att's gsm operated also at 850 and 1900 mhz. This limitation might exist then to prevent 2 different sim services from operating on the same band at the same time.
Hi
OP5 suport (like OP3T) to be 1 sim on 4G (data) and second sim on 3G (voice) ???
post screenshot with sim configuration
thanks
I can only set the data sim to 2G/3G/4G but the second one is only 2G/3G (only need 2G but can not set it).
Klanac89 said:
I can only set the data sim to 2G/3G/4G but the second one is only 2G/3G (only need 2G but can not set it).
Click to expand...
Click to collapse
thanks
my second sim carrier only support 3G (voice and data - band 2100) and 4G (only data)
and from what you tell me it can work
on other dual-sim phones second sim can be only 2G
Where you from? 3G is quadband, so it will work, just maybe not in the USA.
aoprea said:
Hi
OP5 suport (like OP3T) to be 1 sim on 4G (data) and second sim on 3G (voice) ???
post screenshot with sim configuration
thanks
Click to expand...
Click to collapse
Only one SIM can be set as the active Data SIM at any one time. The other SIM can still work over UMTS ("3G"), so the OP3/3T/5 are not affected by AT&T's 2G Sunset. You can still get the calls/text over UMTS.
aenews said:
Only one SIM can be set as the active Data SIM at any one time. The other SIM can still work over UMTS ("3G"), so the OP3/3T/5 are not affected by AT&T's 2G Sunset. You can still get the calls/text over UMTS.
Click to expand...
Click to collapse
If I understand you correctly, the data SIM is software selectable. This would allow me to switch between the SIM cards based on 4g availability.
PS Other posters seem to indicate that only the SIM in the first position can be used to access 4g.
Explore3 said:
If I understand you correctly, the data SIM is software selectable. This would allow me to switch between the SIM cards based on 4g availability.
PS Other posters seem to indicate that only the SIM in the first position can be used to access 4g.
Click to expand...
Click to collapse
Yes. On the 3/3T there was even a toggle in the notification/status bar to switch the Data SIM immediately without needing to head to Settings.
Could someone please confirm with a screenshot showing that the second SIM on the OP5 supports 3G while the first SIM is using 4G or 3G?