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[Q] Universal Service???

So this may be a dumb question, but I can't help but to wonder. Is there a way to use different carrier's networks? I know each operate on their own frequencies or ranges, but it seems with all the things you can do with this phone it could be possible. I think it would be amazing if I could use T-Mobile's or Verizon's 4g network, or just switch carriers whenever one had better service/reception. Is there an app for this maybe? Would it require installation of different modems every time you switch networks? Would you have to modify sim card somehow? Is there any kind of information I can read on this somewhere? Any info is appreciated.

You can only connect to the carriers network for whom you have a sim card for.
Sent from my SAMSUNG-SGH-I897 using XDA App

I know that. I'm wondering if there is a way around that. Verizon doesn't have sim cards right? At least not removable like ATT. Maybe it's just a matter of programming/software on your simcard. I'm just wondering if doing this would be possible. I know how the game goes now, just wondering what stops us from doing this? Aside from the morality issues of stealing.

4got2g0 said:
I know that. I'm wondering if there is a way around that. Verizon doesn't have sim cards right? At least not removable like ATT. Maybe it's just a matter of programming/software on your simcard. I'm just wondering if doing this would be possible. I know how the game goes now, just wondering what stops us from doing this? Aside from the morality issues of stealing.
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Verizon gives u a SIM card if u say u are traveling abroad, and want to use their service abroad.

AT&T and T-Mobile along with some others are aa GSM style of network. Verizon, sprint and others.are based on a CDMA network. They are completely different. The only it could be possible if is all the companies 4G networks were the same, such as LTE. Which is extremely doubtful that it will work that way seeing that Sprint is already going Wimax and T-Mobile HSPA+
Sent from my SAMSUNG-SGH-I897 using XDA App

diablo009 said:
Verizon gives u a SIM card if u say u are traveling abroad, and want to use their service abroad.
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Click to collapse
Didn't know that. I guess I could pay $80 a month to each company. I'm wondering if it's possible to not do that and still get it using only one sim card.

Yes their is. If you have AT&T you can add T-Mobile's APNs along with any other carrier that is GSM that supports your frequency. However, if you switch to that other carriers APN you will be bill astronomical roaming charges.

bptba93 said:
AT&T and T-Mobile along with some others are aa GSM style of network. Verizon, sprint and others.are based on a CDMA network. They are completely different. The only it could be possible if is all the companies 4G networks were the same, such as LTE. Which is extremely doubtful that it will work that way seeing that Sprint is already going Wimax and T-Mobile HSPA+
Sent from my SAMSUNG-SGH-I897 using XDA App
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AT&T is switching to UMTS for their 3G. Same 850 and 1900 bands though. And will be upgrading to LTS for 4g sometime in the near future. I actually install the UMTS cabinets, 850&1900 radios, and coax at towers around here. So there's no possible way to take whatever it is on a sim card that works for a CDMA network and throw it on an AT&T simcard somehow(maybe like a stored contact) and use that programming selectively?

nbs11 said:
Yes their is. If you have AT&T you can add T-Mobile's APNs along with any other carrier that is GSM that supports your frequency. However, if you switch to that other carriers APN you will be bill astronomical roaming charges.
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Click to collapse
Oh so it is possible, but it's considered roaming? I guess that makes sense. Pretty much what roaming is, using something outside of your carrier.

4got2g0 said:
Oh so it is possible, but it's considered roaming? I guess that makes sense. Pretty much what roaming is, using something outside of your carrier.
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The sim card ties a phone to a carrier. There is no software to bypass this. Some phones support 2 sims via 2 slots. As for vzw, there sim is a vodaphone sim and only works in other countries as there is no vodaphone service in the us.
If you want multiple gsm carriers you need multiple sims. EU has a hundred different sim cards to support all the carriers.
Sent from my MB520 using XDA App

alphadog00 said:
The sim card ties a phone to a carrier. There is no software to bypass this. Some phones support 2 sims via 2 slots. As for vzw, there sim is a vodaphone sim and only works in other countries as there is no vodaphone service in the us.
If you want multiple gsm carriers you need multiple sims. EU has a hundred different sim cards to support all the carriers.
Sent from my MB520 using XDA App
Click to expand...
Click to collapse
I have personally use T-Mobile with an AT&T sim card but the bill is not pretty.

What carriers can use?

I am currently using the phone as a pure wiiFi item. I will be coming out of contract with them and do not plain to get a nother contract. I know that att has a pay as you go for $.10/min with a $15 for 100mb. Belive it or noth that is enough for me for data as I normly only us the phone for about 20 min and 10-15 mb a mounth.
What I was woundering is if I unlock the phone are there other carriers I can go to with this phone so that I can compair? Thank for any help on this.

Yes, when you unlock you can choose any carrier of your choice
Big Dog Infuse I997 ICS CatyRom

Which country are you in? You basically need to check what bands the carrier you want to switch from uses. They need to match what your infuse can use otherwise it won't work.
The phone supports: UMTS 850/1900/2100 and GSM 850/900/1800/1900. I think T-mobile runs on a different band but I don't know for sure as I live in Canada. Here in Canada you can use this phone on Rogers (the carrier that sells it), Bell, Virgin, Fido but I don't think it will work on WIND. If memory serves me correctly it might not work on T-mo, Verizon or Sprint (because Sprint and Verizon are on CDMA). If you are in the US you might want advice from someone other than me though.

It works on t mobile because mine is unlocked and my daughter has used it with her T-Mobile sim
Sent from my DROIDX using xda premium

dman3285 said:
It works on t mobile because mine is unlocked and my daughter has used it with her T-Mobile sim
Sent from my DROIDX using xda premium
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yeah but umts bands are incompatible so you still only get 2g.

Isn't it possible to band unlock the infuse, but it requires more than the typical efforts. wasn't some group offering to do it for $50 if you send your phone to them?

Straight Talk. Uses AT&T's networks. But you have to buy a phone off of them with a sim.
Sent from my SGH-I997

There are different types of carriers in America and there are many things scarier can,do to lock certain devices to the network. Tmobile and att are gsm carriers and have some compatibility But they use different bands. The talk works and edge works. No 3g.
Sprint and Verizon are cdma and are not compatible. However Verizon,has phones that are both gsm and cdma and can,work on att. Nextel has Sim cards but are iden. Boost is also half cdma and half iden. And begin is basically sprint.
Then there are the no contract deals like strait talk. Problem is the Sim may be locked to the phone and even if you know the phone has a Sim and is working off atts network it may not work. The strait talk thing is only known to work if you buy a $200 Nokia smartphone and many of those have Tmobile Sims that are locked to the phone. I'm not sure how to tell the tmo version from the att version without looking at the Sim itself. Strait talk seems to just buy rights to use other networks, I've seen phones at Walmart with gsm on the box and others with cdma on the box. I think they use all the major networks depending on the phone.
I also saw an ad for simple mobile. Seems promising but appears to be Tmobile
So no 3g.
In Canada almost all carriers are 100% compatible with att phones. All but one but I forgot the name. So if you're Canadian you have options.

Do not know if you know about this- New T-Mobile Monthly4G $30 Unlimited Web & Text with 100 min of talk
email delivery or purchase monthly cards at Super Walmart.
Can not post link but go to Walmart dot com and search for the card I listed above.. sorry

Consumer Cellular is an AT&T reseller - in fact AT&T phones treat their SIMs as an AT&T SIM, don't even need to unlock.
Sent from my GT-P7510 using Tapatalk

Entropy512 said:
Consumer Cellular is an AT&T reseller - in fact AT&T phones treat their SIMs as an AT&T SIM, don't even need to unlock.
Sent from my GT-P7510 using Tapatalk
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Thanks, good to know. Might have to look into a consumer cellular Sim and an i777. I wonder if it will work with lte in the future (the Sim that is. not the phone) but I can,worry about that when my area gets lte and the next generation,phone comes out.

Thunderbolt a Global phone?

Just read from the Rezound subforum about it supporting global gsm/wcdma roaming.
I'm wondering if it is also possible for the Thunderbolt as the chipsets MSM 8655 and MDM 9600 both support GSM/UMTS mode.
Has anyone tried getting the Thunderbolt to work with GSM network?
Thanks.

I called Verizon about a week ago and they told me that yes the Thunderbolt would work worldwide but its VERY expensive
Sent from my Desensed Tbolt

NickxSfK said:
I called Verizon about a week ago and they told me that yes the Thunderbolt would work worldwide but its VERY expensive
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Did that person say in what way expensive? Roaming rate?
Or was that person talking about CDMA roaming which I know is possible in some countries.
I'm more interested in using other network SIM to work on the GSM network.

wmserver said:
I'm more interested in using other network SIM to work on the GSM network.
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im curious about this also. but i think the sim slot is only for 4g cards. my incredible 2 has a menu in the security settings that allows me to unlock my sim card for use with other carriers. the inc2 is advertised as a global phone though

They said my rates would be large. I think it was like 1.50 a minute for calls and 50 cents a text. So probably not GSM
Sent from my Desensed Tbolt

Sounds about right for most carriers. Depends on the country you travel to. When I travel international on business I kill my phone bill. Almost $1000 for two weeks in New Zealand, almost $700 for two weeks in Argentina. I forgot what I spent for a week in France, but I didn't use my phone as much there.
If you're traveling abroad, really suggest getting a go-phone or some kind of burner in-country. A lot of my colleagues get data SIMs in country at the airport for their data needs.

I also feel that thunderbolt supports GSM & Wcdma, for MSM8655 supports GSM & Wcdma

hzw1199 said:
I also feel that thunderbolt supports GSM & Wcdma, for MSM8655 supports GSM & Wcdma
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I also feel that thunderbolt supports GSM & Wcdma, for MSM8655 supports GSM & Wcdma
Click to expand...
Click to collapse
Hey guys, I was in London last May with my tbolt.
Now that I think about it- I didn't try to switch the radio to a GSM radio with cyanogenmod's network switch, but I can say that there are no CDMA radio towers in and around London.
Also, if you're going to London, be prepared to hunt down wifi. You will almost always pay for it- although there are a few (from what I understand) blanketed areas that O2 has now set up in Kensington for the Olympics. Otherwise, you'll be paying companies like Boingo for hourly access. They have deals with most pubs.
Hope this helps.

I was in Europe during the holidays and had no luck. Where I was there were no CDMA towers so I got no signal. I tried switching the SIM with a Vodafone one and switching the radio to GSM and global with no luck. I had Cm7 on then.

Go get boost mobile and buy 10$ extra per month for international. Cheapest way possible. Get a crap boost mobile phone for calls and texting. Virgin mobile may have this too. I don't understand how its not more cost effective to just buy an extra per month on your current plan
Sent from my Glacier using xda premium

Actually the cheapest way is to pay an unlocked used Droid2, about 50 bucks some places, and use it with a prepaid sim overseas. You can have an extra phone while in the states and use the wifi teather in the EU, in addition to an android working phone, to keep the tbolt w wifi.
On top of that if you connect your normal number to a GV nr and than connect that to a SIP the phone calls cost less than 1¢/min.

t bolt unlock
you know how can activate Tbolt to other gsm can activate that option.

Im from colombia and here dont exist cdma only gsm and my thunderbolt dont run here i don have roaming or signal to call and using a sim maked here i only can see: this sim card is from a unknown source.... Blah blah blah...
Sent from my HTC Thunderbolt using Tapatalk

[Q] Unlocked Fido Razr HD w/ AT&T Sim: "SIM not allowed MM #3"?

Got my FIDO Razr HD. Rogers SIM = all is good. AT&T sim = asks for unlock code, which i buy online.
After entering code, phone appears to do a factory reset. During the reboot, a box pops up:
"SIM not allowed MM #3"
Now the phone permits "Emergency Calls Only" with the AT&T sim. Rogers SIM = still good.
When I put AT&T sim into my other phone (HTC desire) it works fine on roaming (rogers network). So I know sim + signal is fine.
Don't understand this error message.
Did I mess up the unlock?
advice appreciated, thanks.

Do you have another Canadian SIM you can try? Bell/Telus etc?

grant2 said:
Got my FIDO Razr HD. Rogers SIM = all is good. AT&T sim = asks for unlock code, which i buy online.
After entering code, phone appears to do a factory reset. During the reboot, a box pops up:
"SIM not allowed MM #3"
Now the phone permits "Emergency Calls Only" with the AT&T sim. Rogers SIM = still good.
When I put AT&T sim into my other phone (HTC desire) it works fine on roaming (rogers network). So I know sim + signal is fine.
Don't understand this error message.
Did I mess up the unlock?
advice appreciated, thanks.
Click to expand...
Click to collapse
Have you inserted your fido/rogers simcard when you are in usa... and roaming (put the phone on and get the att signal)... if yes... there are no solution you must roam with rogers... imei is recorded via att and you can t use att on your razr ;( this is a strange things... but is real ... many user report this ! ( not just with the razr ) this is not a phone problem
This is a very... great problem for traveller...

grant2 said:
Got my FIDO Razr HD. Rogers SIM = all is good. AT&T sim = asks for unlock code, which i buy online.
After entering code, phone appears to do a factory reset. During the reboot, a box pops up:
"SIM not allowed MM #3"
Now the phone permits "Emergency Calls Only" with the AT&T sim. Rogers SIM = still good.
When I put AT&T sim into my other phone (HTC desire) it works fine on roaming (rogers network). So I know sim + signal is fine.
Don't understand this error message.
Did I mess up the unlock?
advice appreciated, thanks.
Click to expand...
Click to collapse
I was doing some research for you, have you tried using a different SIM card from AT&T? The SIM might be corrupted.
Sent from my XT925 using Tapatalk 2

Really not sure...
My fathers who travel in usa and canada... have tried 2 others att simcard ... same problems ...
i have see anothers topics on howardforum

o2qc418 said:
Really not sure...
My fathers who travel in usa and canada... have tried 2 others att simcard ... same problems ...
i have see anothers topics on howardforum
Click to expand...
Click to collapse
Are the SIM cards prepaid or postpaid? Did you have to cut then yourself or were they already micro sized?
Sent from my XT925 using Tapatalk 2

I have try with a rogers xt925 last month ... tried with different sim... micro and regular... postpaid and prepaid too... have see many people in the same boat...
Sent from my XT925 using xda premium

If you think AT&T are blocking your phone, then why don't you try T-Mobile...?

... Yes no problem with tmobile or others prepaid carrier on att network...
You just don t roam on att with uour rogers simcard...
Sent from my XT925 using xda premium

Thanks for the replies everyone. to answer the questions:
1) i don't have any other sims right now: just rogers + ATT. Next time i am w/ friends I will ask to borrow telus/bell microsim.
2) they were regular sims that were cut down.
3) haven't had a chance to visit USA since posting topic- but when i do, i will test both cards and also visit an AT&T shop to bug them about it.
Is sim corrupted? I don't think so because it works fine in HTC desire. But I guess trying a new one will prove or disprove.
imei is recorded via att and you can t use att on your razr ;( this is a strange things... but is real ... many user report this ! ( not just with the razr ) this is not a phone problem
Click to expand...
Click to collapse
How do we know this is happening, has someone from AT&T discussed this before?

grant2 said:
Thanks for the replies everyone. to answer the questions:
1) i don't have any other sims right now: just rogers + ATT. Next time i am w/ friends I will ask to borrow telus/bell microsim.
2) they were regular sims that were cut down.
3) haven't had a chance to visit USA since posting topic- but when i do, i will test both cards and also visit an AT&T shop to bug them about it.
Is sim corrupted? I don't think so because it works fine in HTC desire. But I guess trying a new one will prove or disprove.
How do we know this is happening, has someone from AT&T discussed this before?
Click to expand...
Click to collapse
I want to let you know that I was able to use a Bell sim card in my phone. That's what I used to unlock it with.
Sent from my Nexus 7 using Tapatalk HD

grant2 said:
Thanks for the replies everyone. to answer the questions:
1) i don't have any other sims right now: just rogers + ATT. Next time i am w/ friends I will ask to borrow telus/bell microsim.
2) they were regular sims that were cut down.
3) haven't had a chance to visit USA since posting topic- but when i do, i will test both cards and also visit an AT&T shop to bug them about it.
Is sim corrupted? I don't think so because it works fine in HTC desire. But I guess trying a new one will prove or disprove.
How do we know this is happening, has someone from AT&T discussed this before?
Click to expand...
Click to collapse
I am using this phone with at&t with no problems, I took my sim out from my iphone 5 and used a adapter to go to micro sim and it works fine, no issues.

I'm receiving a Fido RAZR HD to be used with AT&T this afternoon, I'll let you guys know if there are any issues.

OOI, is AT&T seen as a much better GSM network than T-Mobile in the US?
I was looking at the T-Mo USA site, and there are some amazing "Monthly4G" SIM only plans (e.g. $30/month for 100 minutes, unlimited texts and 5GB of HSPA data).
This seems much better value than AT&T, Verizon and even Sprint! But is their network sketchy compared to the others?

Sumanji said:
OOI, is AT&T seen as a much better GSM network than T-Mobile in the US?
I was looking at the T-Mo USA site, and there are some amazing "Monthly4G" SIM only plans (e.g. $30/month for 100 minutes, unlimited texts and 5GB of HSPA data).
This seems much better value than AT&T, Verizon and even Sprint! But is their network sketchy compared to the others?
Click to expand...
Click to collapse
AT&T offers the second largest network coverage behind Verizon. They are also one of the two GSM carriers in the United States, and tend to be more popular with mobile phone enthusiasts because their UMTS bands are more common and used with other regions such as Canada or Australia. T-Mobile does indeed offer excellent value, but they use mainly AWS band in addition to PCS band in selected regions, thus making them the lesser choice for using unlocked phones from outside the country.

Hey,
Just looking on wiki:
http://en.wikipedia.org/wiki/T-Mobile_USA#Radio_frequency_spectrum_chart
http://en.wikipedia.org/wiki/AT&T_Mobility#Radio_Frequency_Summary
It looks like T-Mo mainly use 1900 for 2G and 1700 for 3G, whereas AT&T use 850 and 1900 for both 2G/3G, right?
So if I bought a Canadian Razr HD XT925 and came to the US, would I be able to use T-Mo's 3G network? I am guessing no, since it does not support 3G on 1700MHz.
But then there is a note on that Wiki page saying that they now have a roaming agreement with AT&T after the failed acquisition. So if I forced the phone into "WCDMA only" mode from the test menu, would it then fall back onto the AT&T 3G network?
Sorry for taking the thread slightly off topic
Cheers,
Su

Sumanji said:
Hey,
Just looking on wiki:
http://en.wikipedia.org/wiki/T-Mobile_USA#Radio_frequency_spectrum_chart
http://en.wikipedia.org/wiki/AT&T_Mobility#Radio_Frequency_Summary
It looks like T-Mo mainly use 1900 for 2G and 1700 for 3G, whereas AT&T use 850 and 1900 for both 2G/3G, right?
So if I bought a Canadian Razr HD XT925 and came to the US, would I be able to use T-Mo's 3G network? I am guessing no, since it does not support 3G on 1700MHz.
But then there is a note on that Wiki page saying that they now have a roaming agreement with AT&T after the failed acquisition. So if I forced the phone into "WCDMA only" mode from the test menu, would it then fall back onto the AT&T 3G network?
Sorry for taking the thread slightly off topic
Cheers,
Su
Click to expand...
Click to collapse
As you have read, T-Mobile did acquire PCS bands from the failed merger with AT&T, but these bands are not as utilized as their 850 MHz band so it's not as widely available as you may think. Some areas might be able to use the 1900 MHz band for T-Mobile 3G, but I would check with fellow T-Mobile users to confirm first before you dive in headfirst. I know that there are T-Mobile users in the Dallas-Fort Worth area that are getting 3G data connectivity with their unlocked AT&T iPhones.

Well T-Mo do daily plays for like 2 bucks right, so I can always try this out before committing to a contract
Do you think AT&T would be the better bet if I am bringing my own device from Europe?
The reason I ask is that I may be coming to a US college for a couple of years, so naturally, I'm planning ahead to see if my phone will work over there

Sumanji said:
Well T-Mo do daily plays for like 2 bucks right, so I can always try this out before committing to a contract
Do you think AT&T would be the better bet if I am bringing my own device from Europe?
The reason I ask is that I may be coming to a US college for a couple of years, so naturally, I'm planning ahead to see if my phone will work over there
Click to expand...
Click to collapse
If you're using a device from Europe or Asia, then yes, you have a much higher chance of being able to get 3G connectivity with AT&T. Off the top of my head, Nokia seems to be the only one that tries to actively keep AWS band in their radios.

Hmm, so I did a bit of research on GSM Arena. Seems the Nexus line of devices consistently support 1700MHz 3G (including the Nexus S which I currently have).
Guess who cancelled their Nexus 4 order last week, and opted for a Canadian RAZR HD instead...
Whoops

Which carrier for a month while traveling to the US?

Hi,
I have a International Google Pixel bought from a Google authorized re-seller in India. The model number printed on the back of the phone is G-2PW4200. I am going to be in traveling in the US for about a month starting next week. Which carrier would be my best bet for a prepaid sim card along with fastest data connectivity (LTE)? In the past I'd had some issues using Asian phones in the US due to band restrictions on Asian sold devices. A couple of years ago I was stuck on 3G on AT&T since my phone didn't support their LTE bands. Last few times I've been to the US I have just bought a starter kit from Net10 wireless which has sim cards inside for all the major carrier networks and I can choose to activate my Net10 wireless card on any of these carriers. Is this still the best approach? Or should I look at getting a prepaid sim directly from T-Mobile or AT&T? Which carrier would work flawlessly with my Pixel? To me LTE connectivity for data and international voice calls for super cheap prices (even unlimited) are the two most important things in carrier selection.
Thanks for the help.

Try Project Fi. I'd give them a call.
Sent from my Pixel using XDA-Developers Legacy app