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.
Related
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!
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.
So I purchased a used note 3 ( N900A )
I just switch to straight talk. So I had a full size sim and cut it down to fit my note 3 . When I try to go into my apn setting it says insert a sim or something like that.
I know the sims registering , to the phone I can read stuff from it.
So has any one went down the road I am . Is my sim locked or something like that.
Also there is an app called "Sim App." it will first say icc-id and give what looks like about 15-16 numbers then click ok it reads imei check sum gives 4 digits next reads random number gives 8 numbers.
then asks for an unlock code . If entered wrong it will say you have X amount of trys lefts.
Does this have anything to do with why my sim card is not registering to the phone?
Do any sim card works in the phone? Does your sim card work in other phones? Was the phone tested with a sim card before purchase? Was the phone locked to AT&T?
audit13 said:
Do any sim card works in the phone? Does your sim card work in other phones? Was the phone tested with a sim card before purchase? Was the phone locked to AT&T?
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Yes if I switch the card to the other phone . It works.
Im not sure if this matters the orginal phone was a throw away`alcatel. Its not a smart phone.
Are you using the SIM card in another phone that also uses a micro sim? Does the note 3 recognize any SIM cards?
audit13 said:
Are you using the SIM card in another phone that also uses a micro sim? Does the note 3 recognize any SIM cards?
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Click to collapse
I only have this one sim .
The note is reading the sim card with certain aps . You know how if you up power up a phone , missing a sim it will say so if you pull down the top banner usually with a message like insert sim. When you pull down the top banner it doesn't say that . There is no warning about missing a sim . So it recognizes it has one . I can read stuff off the sim card when i open certain aps that are meant to access sim cards but when I go to change APN setting it will say insert sim card to access network settings.
Without another sim card to try in the phone, it could be the way the sim card was cut or there is something wrong with the phone.
Is the phone sim unlocked? Did you try a sim card in the phone before buying it?
audit13 said:
Without another sim card to try in the phone, it could be the way the sim card was cut or there is something wrong with the phone.
Is the phone sim unlocked? Did you try a sim card in the phone before buying it?
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Click to collapse
I dont think the phones sim is unlocked.
No I didnt try a sim . It was from a family member so Im not to worried. The sim card works in my throw away straight talk phone.
How do you unlock the phones sim?
BTW thank you for your help.
In order to determine if the phone is sim unlocked, power off the phone, insert a sim from another carrier, and power up the phone. If phone asks for a network unlock code, the phone is not sim unlocked and you will need to get an unlock code.
Was the Note 3 n900a from AT&T?
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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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.
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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
Sent in my Nexus 6 phone to get the battery replaced, so, while being out with no phone... I figured I would pop in the nano sim card into the AIwatch C5 slot. Didn't work. It's liked it didn't even acknowledge the SIM card, no phone, no email, no texting etc...
My carrier is a GSM based network, with 3G, LTE capability Nationwide (Canada). All my phones have been unlocked, so I have never had a problem using this SIM before. When I did get my phone back, popped back in the sim card and phone worked immediately. Oh, and my sim card is not sim locked nor encrypted.
Anybody else try out there C5 sport watch with a sim?