After suffering some major connection issues and dropped calls, I called T-Mobile to *****. They were actually pretty cool with the fact that I had rooted my HD2 and loaded Nandroid on it. They said my problem was due to the fact that I had a 2G Sim Card. They said I needed to visit a T-Mobile Store and have them swap my card out with a 3G Sim Card. Its free to have them do this. This actually solved many of my connection problems. I now get excellent 3G / H signal in places where it would normally drop off to Edge. If you don't know which card you currently have, all you have to do is take out your sim card and look at the Gold Contacts. Check out my blog for photos showing the difference between the two cards. Tmobile 3G Sim Card vs 2G Sim Card
I hope this helps others with poor data connection and dropped calls!
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So my new Exec turned up today, along with a new SIM card, marked 3G.
Do I need to use this card?
My current SIM works fine in it, but Im wondering if I need to put in the new one, call Cust Services and have it enabled, or can I get the 3G service on my existing SIM?
Depends , the 3G card will allow faster internet connection- if in service area
if in stand gprs area , you get a G at top of screen
if in 3G area you get a U
Does that mean I have to use and register the 3G SIM? As far as I was aware, the SIM doesnt actually provide any functionality - its the service class your contract has?
@CPGOD
3G and GSM SIMs are different. Only with a 3G SIM can you use UMTS (3G services). Please check with O2, they may be transferring your number to the new SIM from the old - which would be a good thing if you want fast data download (max speed around 384kbps)
not true, my voda sim of over two years is now 3G enabled...
@twaddle, you're right it is possible to have a SIM that is GSM and UMTS. Did a bit of research and found SIM cards can function in GSM and UMTS modes. This has not been true for "3" network, however.
I'm not really sure the old SIM can be used to received 3G, I've just upgraded and got my old number transfer to the 3G sim, it works after a few hours. If the old one worked then why would they bother giving out the new sim?
Ok, so i was explaining to my lil sister about sim cards, and as i was saying how only Verizon worldphones had sims, i realized that you could, in theory, put a Verizon 4g sim into a 3g worldphone, and.... what would it do? I'm a little hazy on how exactly Sim cards work, but would it be possible to artificially "create" a 4g phone using a 4g Verizon sim?
EDIT: ok, since there are no answers, i realize this is a noobish question, but does the sim card contain the actual 3g/4g/whatever radios, or does it just "enable" them?
The sim card contains the customer account information, so once you lock the signal verizon knows how to properly bill you for your usage.
4G sim cards are different than 3G sim cards although they are in the same format. You can't just swap your Droid 2 Global Sim card and expect to work in your Droid 3 or vice versa becuase the ESN is what is tied to your number, the sim card is just there for roaming purposes (i may be wrong on that one), but i know that even on the global phones, you must have the sim card inserted in the phone to be able to get service with verizon.
The 4G sim card works more like a REAL (GSM) simcard you can swap your sim card into another 4G device and your number will transfer.
Here is another difference, the same sim card on global devices can be reused like you can go to your account and transfer your phone to another account without the need for another sim card. The 4G sim cards become invalid once they are deactivated and you will require a new blank sim card in case you want to activate your phone number again (this usually happens when you switch from a 4G device to a 3G, then move back up to a 4G device), they work much like most GSM sim cards work.
So in sumary, the 4G sim cards works more like a real sim card.
have a 2 Optimus quantum phones, one never gets 3g, or H, data doesn't seem to work at all (i changed APN settings to fido)
could this be do to old sim card? its really old before 3g network existed, when edge was early
other phone works ok, setup in identical way but sim card is newer from an iPhone 3g i had
so as question above says could it just be due to an old sim card?
Swap the working SIM card between phones and you will have your answer
I think you guessed it. My network (Rogers) required new SIM cards to work on their 3G network. Your carrier may have the same situation.
In my case, Rogers was happy to swap the old SIM for a new one.
As the title says... Mostly I need to know in general if I´d be able to use my 3G sim into a LTE phone. Need to know this because Google is probably releasing a Nexus 4 phone On Google I/O which is said to be TLE enabled and will have 32 gb for storage.
Honestly i only care about the 32 gigs because I live in Costa Rica, Central America and LTE is still not avaiable here, and who knows when will it arrive so I'll stay with my 3G sim card for an undefined time. It's important to mention that plans in my country do not restrict using my sim card on a certain phone, or viceversa, everything is totally unlocked (at least with my phone company) so I can do whatever i want concerning with switching betwween phones and stuff. So, If an LTE phone can read my 3g sim card i'd surely buying this awesome phone. I use A LOT my actual phone for music playback and that's why my focus is on the huge 32 gb storage.
So, again, can I use a 3G sim card on a LTE phone and have access to the normal phone functions (calls, messaging, 3G internet...)??????
I'm asking this because on my research on Internet I found people who say it does is possible and a lot who say it isn't...
Unless it is a CDMA device, a "3G" SIM will work fine, my current SIM card is "3G" (Straight Talk doesn't offer LTE) and the current Nexus 4 is capable of LTE...I'm not having any issues.
Now I've read sometimes older SIMs have issues with newer phones but I haven't had that issue.
so if there's a problem i'd just need to update my old 3g sim for a new one and that shoud work for any phone marketed as LTE or 4g???
HI EVERYONE,
Hope you can help me or give an advice...
I got Xperia Z5 Dual Sim Card phone. I'm on UK network. If I use both sim slots with the same provider, one of the slots stops working immediately. Shows no signal bars whatsoever. As soon as I use two different sim cards from different providers, both work fine. I called my network provider, but they state it's a phones fault.
Has anyone experienced anything like that?
Can you buy new sim card? And try with the new one
Sent from my E6653 using Tapatalk
Could it be your carrier doesn't have GSM coverage in your area?
I think 3 in the UK does not have GSM. When you are in 'dual standby' mode one of the SIM cards MUST be on GSM only mode, therefore if your carrier doesn't have GSM it will never connect. This is a funny limitation, but it's what allows for dual standby phones to be made relatively simple without having to have two radios for two carriers, which would make the phone a lot bigger and complicated.
I went to the actual store and swapped the sim cards, but nothing helped
bartolo5 said:
Could it be your carrier doesn't have GSM coverage in your area?
I never thought of that... It's strange as I went to Vodafone store and they said they don't support dual sim card phones at all.
I am actually with network 3, so thought there shouldn't be issues like this. Another funny thing is, that if I swap the slots with the same network 3 sim cards, sometimes slot No1 and sometimes slot No2 isn't working. As soon as I put one Vodafone and the other network 3 sim cards, both slots work just fine
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Click to collapse
NewToWeb said:
HI EVERYONE,
Hope you can help me or give an advice...
I got Xperia Z5 Dual Sim Card phone. I'm on UK network. If I use both sim slots with the same provider, one of the slots stops working immediately. Shows no signal bars whatsoever. As soon as I use two different sim cards from different providers, both work fine. I called my network provider, but they state it's a phones fault.
Has anyone experienced anything like that?
Click to expand...
Click to collapse
I used my Z5 Dual when I was in the UK and was having real problems getting the EE sim card to work on the data side, it seems that when I put in the EE card my phone restarts (annoying but standard) and it resets the data preference to 3G which meant that I had no coverage. As soon as I switched the data preference to LTE it was up and running full guns again.
Phoomeister said:
I used my Z5 Dual when I was in the UK and was having real problems getting the EE sim card to work on the data side, it seems that when I put in the EE card my phone restarts (annoying but standard) and it resets the data preference to 3G which meant that I had no coverage. As soon as I switched the data preference to LTE it was up and running full guns again.
Click to expand...
Click to collapse
Thanks for you answer. Seems that it's more to do with the provider then the actual phone.
Sad that phone like this couldn't be used to it's full potential