Database Users

3g problems

Hi. Newbie in this forum. Bought an htc tytn from u.s. but am from Phil using smart carrier with gsm band at 1800. after going thru sev topics, properly identified device as Herm200 rom:1.18.255.3 07/22/06 extrom:1.18.255.106 radio1.03.03.10 protocol32.34.7010.01H.
All phone features working perfectly except for 3G. Smart carrier people cannot help. What could be wrong. Vendor says 3g works on 2100 band. Confusing statement. What can be done? Connects to umts but when video call is pressed will not connect.

Which carrier are you on again? Smart Carrier? .. From what I know no carriers in the US support video calling .. Also, Cingular is the only GSM carrier in the US with 3G which runs on the 1900Mhz band ..
also .. what does your phone display while connected "G" or "U" ... what are your phone band settings .. can you also goto dslreports.com/mspeed and see what speeds are you getting ..

According to GSM world SMART (a Philippine operator) uses UMTS 2100, which your TyTN does definitely support.
Have you checked if your SIM card is 3G-enabled? Most 3G networks require special USIMs for 3G usage.
I just learned, that Cingular uses UMTS 850 and 1900 to be exact. According to the American HTC website the Cingular 8525 supports "Tri-band UMTS/HSDPA high speed wireless data network support (2100MHz and 850/1900 MHz), Quad-band GSM®/GPRS/EDGE worldphone".
Does anyone know if there is a special hardware version, that supports UMTS850 & 1900 or will my European TyTN work on those networks, too?

TyTN is tri-band UMTS .. 850/1900/2100 .. so it should work on these networks without any issues ...
And my bad .. didnt realize that you are trying to use the TyTN in Phillipines ..

You should also check, if the called party has a 3G signal, while you call him. Further make sure video calls are activated by your network operator.

3g problems in the philippines
Everything you guys mentioned in order(am in a 3g area calling a 3g enabled party with a 3g sim card). Even the tech staff behind Smart Communications cannot make it work. Displays U and u. But video call cannot push thru even if pic on front camera shows. There is 1 thin line( or command?) stopping it from connecting. My last option is to borrow my friend's unit and see if her unit's 3g works here then it's my device that's a problem. Thnks for the input. Keep it coming.
Herm200 qwerty rom:1.18.255.3
07/22/06
extrom:1.18.255.106
radio1.03.03.10
protocol32.34.7010.01H.

Hi. I don't know how they did it but Smart Communications did it! Apparently and ironically their 3g sim card is not compatible with the htc tytn but their regular sim is. Thanks all.

are u using 3G now in Phil ?
Is there a Globe perpaid 3G simcard ?

3g problems no more
Hi everyone. After my first thread i have finally got everything on my tytn working: 3g, mms, internet, phone. The problem was on the settings. Smart and Globe, the primary carriers in the Philippines can both work on the phone if the settings are right.

sectorlord,
yes there is 3g and hsdpa along with gsm and gprs and wap in the philippines. and yes you can buy globe prepaid 3g sim card.

glad to hear you've got your problems solved jjc!

U in Canada with non3G sim?

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

3g sim card question

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)?
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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)

A2017U Dual SIM drops connection

Device: A2017U
Software: Stock, rooted (if it matters), B29
Sim 1: Tmobile gsm mode (connected to tmobile) for voice only
Sim 2: freedompop gsm/hspa mode (connected to att), for data only
Issue: Device keeps losing connection to tmobile when sim 2 is enabled. My immediate area has relatively poor tmobile coverage so keeping it in 2g (gsm) mode extends battery life. It'll stay connected for a bit, then drops, and doesn't regain until I disable/re-enable sim 2. I haven't tried disableing/re-enabling sim 1, but that may also work.
It seems there's some incompatibility when gsm mode is set.
I haven't tried swapping the sim cards yet as the freedompop sim has been removed from its plastic (both sim cards + sd card currently installed).
I wonder if the issue is because in general sim1 has greater priority, and is being used with a lower/inferior network standard (gsm vs hspa). When both are set to gsm/hspa, no disconnect issues, but signal is a good 10 db weaker on the tmobile side.
Thoughts?

Try flipping the sim orientation, see what that does. I'd also try to let your voice only sim camp on umts. Tmobile has been cannibalizing 2g and lots of the newer towers don't have 2g installed on them.

Harmtan2 said:
Try flipping the sim orientation, see what that does. I'd also try to let your voice only sim camp on umts. Tmobile has been cannibalizing 2g and lots of the newer towers don't have 2g installed on them.
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Click to collapse
I'll definitely give that a shot.
Further research (tmo ........................ att ) , shows that tmo gsm operates at 1900 mhz, while att hspa also operates at 1900. Since the dual sim set up on here is active standby, I wonder if the different carriers operating at the same freq has something to do with it.

Harmtan2 said:
Try flipping the sim orientation, see what that does. I'd also try to let your voice only sim camp on umts. Tmobile has been cannibalizing 2g and lots of the newer towers don't have 2g installed on them.
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Click to collapse
Swapping sims didn't change anything. Looks like I'll just leave it on 3g and call it a day. In fact, most of the usage is data, so the voice sim can be turned off most of the time. I use gv for my primary number, there's an immediate email notification for any missed calls even if the caller hangs up.

AT&T & Verizon Sim

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.
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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.
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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.