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I noticed that the SIM cards keep changing every so often.
The new SIM cards have a smaller gold-metal surface area, whereas the older ones have a bigger gold-metal surface area.
Any ideas why?
Is there any benefit to swap out your SIM card to the newest? The SIM that comes in the box has a smaller gold-surface area.
(When was using previously using the iphone, my SIM was pretty beat up from switching phones all the time and the gold-metal part practically had indentations, which did give me reception problems. When I swapped it out with a new one at the store it did fix the problem. Obviously a surface contact problem.)
* Picture attached below *
iunlock said:
I noticed that the SIM cards keep changing every so often.
The new SIM cards have a smaller gold-metal surface area, whereas the older ones have a bigger gold-metal surface area.
Any ideas why?
Is there any benefit to swap out your SIM card to the newest? The SIM that comes in the box has a smaller gold-surface area.
(When was using previously using the iphone, my SIM was pretty beat up from switching phones all the time and the gold-metal part practically had indentations, which did give me reception problems. When I swapped it out with a new one at the store it did fix the problem. Obviously a surface contact problem.)
* Picture attached below *
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Here's the pic.
I did have a weird situation where replacing the sim actually somehow increased my data speeds...the old sim was only a year old ...but i ain't complaining
didn't really notice any less surface area tho
newspeak said:
I did have a weird situation where replacing the sim actually somehow increased my data speeds...the old sim was only a year old ...but i ain't complaining
didn't really notice any less surface area tho
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That's interesting....hmmm....now I'm really curious haha...
I swapped out my 1 year old SIM as well and now im getting 3G signals in my house whereas my old sim would drop 3G service more often.
Idk I change sim cards for all my phones since g1 since there's nothing on it ever since using google contacts
Sent from my SGH-T959 using XDA App
There is typically no need to replace your sim card unless you are having problems with it (ie not registering on the network.)
However older sim cards have a restriction on how many times they can register on the network, and after they hit the limit the phone will stop connecting, so if you want to prevent this issue (usually takes a couple years, and is a lot more likely in areas where your signal drops, for people who travel a lot, and in 3G coverages areas where you swap back and forth between 3G and 2G) you can use one of the newer sim cards. To Identify whether your sim is the newer variant with no registration restriction look at the back where the gold contacts are, if its a newer sim it will say in small lettering "TMXXXX" (where X is a number, ie TM4322) and it will also have an expiration date printed (it must be activated by this date or it becomes unusable.)
In terms of 2G/3G the sim card itself and its age should not make a difference as the capability to connect to those networks is dependent on the phone, not the sim. You can think of a sim card as a gateway that connects your phone to the billing system and authenticates it.
Having had said that, if you are having connection issues it could just be a defective sim card, to check, just place the sim in a phone that isn't having any connectivity problems, if it starts having problems, replace your sim.
In terms of the digit you highlighted in that picture, I believe it has to do with the manufacture year, although if I remember correctly its digits 4 and 5 that make up that information, but otherwise isn't anything important to a consumer.
well i got curious and checked ....i have the bigger sim ...i don't think the numbers matter much
Aphotix said:
There is typically no need to replace your sim card unless you are having problems with it (ie not registering on the network.)
However older sim cards have a restriction on how many times they can register on the network, and after they hit the limit the phone will stop connecting, so if you want to prevent this issue (usually takes a couple years, and is a lot more likely in areas where your signal drops, for people who travel a lot, and in 3G coverages areas where you swap back and forth between 3G and 2G) you can use one of the newer sim cards. To Identify whether your sim is the newer variant with no registration restriction look at the back where the gold contacts are, if its a newer sim it will say in small lettering "TMXXXX" (where X is a number, ie TM4322) and it will also have an expiration date printed (it must be activated by this date or it becomes unusable.)
In terms of 2G/3G the sim card itself and its age should not make a difference as the capability to connect to those networks is dependent on the phone, not the sim. You can think of a sim card as a gateway that connects your phone to the billing system and authenticates it.
Having had said that, if you are having connection issues it could just be a defective sim card, to check, just place the sim in a phone that isn't having any connectivity problems, if it starts having problems, replace your sim.
In terms of the digit you highlighted in that picture, I believe it has to do with the manufacture year, although if I remember correctly its digits 4 and 5 that make up that information, but otherwise isn't anything important to a consumer.
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Thanks for your input.
As for the exp. date, where is that located. I don't see it.
Aphotix said:
In terms of 2G/3G the sim card itself and its age should not make a difference as the capability to connect to those networks is dependent on the phone, not the sim. You can think of a sim card as a gateway that connects your phone to the billing system and authenticates it.
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That's what I thought...until a lot of people started noticing better 3g connection/speeds with the new sim cards. Just a placebo effect perhaps?
The size difference could also be for users who want to make it a micro sim so they can put it in their unlocked iPhones. I don't have either of these sim cards to compare, so I'm not sure.
hmm.. the sim im using is almost 8 years old. its been moved from phone to phone so many times there are wear marks on the contacts. still works fine though.
When I first got my g1 a few years ago I had issues with the market. There were apps that I knew were available (private apps) but I could not download them. I went to a T-Mobile store and looked at the display phones. One of them was able to see private apps, the other like mine, could not. I talked it over with the rep and we decided to replace the sim card. It was a random, no other ideas, decision. Started the G1 back up and Market was now working as expected. There were no other benefits noticed. Since then, I tend to replace the sim anytime a new phone is purchased.
Your milage may vary.
-Ryan
Sent from my SGH-T959 using XDA App
When I got my Vibrant, coming from the g1, tmo wanted to just pop it in the Vibrant. I made them put in the new sim card just to be safe, figured the one that came in the box brand new SHOULD be better.
iunlock said:
Thanks for your input.
As for the exp. date, where is that located. I don't see it.
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Its only on the newer ones, the old ones don't expire, they just stop working after a set number of registrations on the network.
In regards to sim issues, they really shouldn't have any impact at all. Changing a sim card refreshes the billing information in the system (like what kind of services your phone is supposed to have and what not) customer care can do this without the need for a new sim.
Hoenstly though, sometimes a sim replacement is needed, I've seen stranger things.
s15274n said:
When I got my Vibrant, coming from the g1, tmo wanted to just pop it in the Vibrant. I made them put in the new sim card just to be safe, figured the one that came in the box brand new SHOULD be better.
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When I bought my phone out right, the rep opened the box and took out the SIM then sold me the phone.
I guess it doesn't matter since swapping out your SIM at the T-Mobile corporate stores is free.
I just tried this since there is a tmobile store across from where I work. I used SpeedTest app and ran it 3 times before the swap. Average was about 2500 kbps download and 300 up. I swapped the sim out, went back to the spot where I originally tested and ran three more times and got about the same rate with the new sim. My old one was about 3 yo from when I had my Dash.
MonkySlap said:
I just tried this since there is a tmobile store across from where I work. I used SpeedTest app and ran it 3 times before the swap. Average was about 2500 kbps download and 300 up. I swapped the sim out, went back to the spot where I originally tested and ran three more times and got about the same rate with the new sim. My old one was about 3 yo from when I had my Dash.
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I'm thinking the only time one would see a difference is if they are having poor contact surface from the SIM wearing out. I've seen ooolld SIM's where the metal had indentations like no other.
Just read the thread and said why not had the same sim card since I first signed up with tmobile 5 years ago.
When I talked with the rep on the phone and explained this to him and asked could this help he stated that the official tmobile policy is if the old sim card works no need to switch. However, because of the technical specs on the card could cause better reception, they just can't guarantee it, they only guarantee it will not get worse. He asked if I was having issues and I said no i'm just a nerd and wanted to know if it would help. Just swapped it out going to give it a test around the house and will report back.
Back Story:
Upgraded from G1, perfect 3G everywhere in chicago, couldn't even get it to drop from 3G no matter where I went. With the Vibrant and and old sim card, constantly dropped to 2G no big deal still was speedy
New Sim Card:
will report after testing
Old Sim Card
My connection constantly jumped from 2G to 3G all over my house constantly
New Sim Card
Solid 3G all through the house, will report back after tomorrow when I travel all over chicago
Some time ago I posted on this forum re no end of data 3G dropouts on my Galaxy SII meaning I was experincing no end od 3G data drop outs. Well anyhow today I decided to do some experimentation and to swap SIMS.
I have two mobiles, a Galaxy SII and also a Samsung Omnia 7 WP7 Mango. I decided to swap SIMS, put the GSII SIM in the Omnia 7 and the vice versa.
I switched both phones back ON as usual, inserted the SIM PIN code and bith phones booted up without any hassles.
Now here is the interesting thing. I ran both the phones for about 40mins, thinking and assuming if the SIM was faulty from the GSII the Omnia 7 would start to play up, but unfortunately both phones ran without any hickups and better still the GSII and the Omnia 7 did not face any data 3G internet dropouts, the GSII ran well and not a single data dropout and the same went for the Omnia 7, but my main focus here was more on the GSII.
But as soon as I put the SIMS back into their original phones the trouble for the GSII started again a bit later on.
So here the big Q whats the fault here, the phone or the SIM.
My guess is that the sim that is originally in your GS2 is faulty. Perhaps the sim is worn where the sim is touching?
You ruled out a phone issue when you put another sim in your GS2 and it was running fine.
Just my opinion anyway.
Thats correct when I inserted the SIM from the Omnia 7 (my other phone) into the GSII and left it running and on the data/internet for 40mins or so I did not get one droput what so ever and the same goes for the SIM from the GSII in my Omnia 7, so i.e a sim swap.
But the funny thing is non of the data on both phones dropped out.
Now assume if the SIM is the GSII is faulty, why didnt it cut out or I loose data connection when it was in the Omnia 7, this is what I cant figure out.
Also can a faulty SIM cause this problem.
I'm assuming that the Omnia7 has better contact points on the sim from your GS2. And that's how it's not faulting.
Are you only losing DATA and still retaining all phone signal?
If that is the case then it may not be a sim issue but a carrier issue based on which baseband version you're running on your GS2?
It could be the pins of the Omnia 7 are slightly more raised than that of the GSII, probably the GSII ones a slightly more flat so the contact of the SIM and pin is just touching or skimming the surface or yet again the SIM is just faulty.
Now the other funny thing here is, say for eg if I am on the phone i.e a call and the data all of a sudden drops out, than my call will drop out as well. But this problem is more data than call.
How do find out what baseband I am using and can the carrier fix this issue.
interesting discovery for myself a little bit ago and i cannot find anything on google relating to the rezound being capable of using either sim
i dont have pics, but i've only seen rezounds with the larger white sim
and now i'm finding out that its capable of using the micro sim (thanks swilbert80 for bringin a few more hours of my life into sim research, inadvertently of course) lol
first, i wonder if there is a performance gain using a micro sim?
seems like it is generation 2 sorta, for all i know they work just the same - but i find it very interesting that its never been discussed (or at least i cant find)
ive swapped my sim out once as advised by technical support to resolve poor 4g reception - nothing was said to or mentioned of trying a micro sim,
anyways, any and all insight appreciated, curious to know what others have as a percentage...
thank you for lookin
MotoDj said:
interesting discovery for myself a little bit ago and i cannot find anything on google relating to the rezound being capable of using either sim
i dont have pics, but i've only seen rezounds with the larger white sim
and now i'm finding out that its capable of using the micro sim (thanks swilbert80 for bringin a few more hours of my life into sim research, inadvertently of course) lol
first, i wonder if there is a performance gain using a micro sim?
seems like it is generation 2 sorta, for all i know they work just the same - but i find it very interesting that its never been discussed (or at least i cant find)
ive swapped my sim out once as advised by technical support to resolve poor 4g reception - nothing was said to or mentioned of trying a micro sim,
anyways, any and all insight appreciated, curious to know what others have as a percentage...
thank you for lookin
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The only difference between a regular SIM and a MicroSIM card is the physical size different, the actual circuit and contact part of the SIM and MicroSIM card is identical.
As for resolve poor 4G reception due to SIM card? Man tech support say the darnest things. It has NOTHING to do with 4G reception. It's nothing but an excuse to keep you in the loop while they won't admit it could be either the phone or their network's problem.
Going back to the topic. I have the first generation SIM card from Verzion as it came with my good old Thunderbolt.
I've been wondering though, when the next gen iPhone which supports LTE is released, if a simple SIM swap would complete the process of activation like between 4G devices now is going to be applicable or not...
SteveDusa said:
The only difference between a regular SIM and a MicroSIM card is the physical size different, the actual circuit and contact part of the SIM and MicroSIM card is identical.
As for resolve poor 4G reception due to SIM card? Man tech support say the darnest things. It has NOTHING to do with 4G reception. It's nothing but an excuse to keep you in the loop while they won't admit it could be either the phone or their network's problem.
Going back to the topic. I have the first generation SIM card from Verzion as it came with my good old Thunderbolt.
I've been wondering though, when the next gen iPhone which supports LTE is released, if a simple SIM swap would complete the process of activation like between 4G devices now is going to be applicable or not...
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Click to collapse
Actually sims can go bad, it's a computer chip and they can interfere with a lot of things on the phone, it's main purpose is for authenticating and utilizing the radio in the phone, so bad sim card = tons of connection issues.
I experienced it with an old AT&T sim which I used to switch between phones a lot. though micro-sim vs regualar sim is irrelevent, they are the same thing just cut different.
Just getting a new sim, either kind should fix the issue if you have a bad sim.
A simple sim swap will do the basic activation of the lte iphone when it comes out just like swapping androids.
The only exception is that iphones interface with voicemail and sometimes data differently (at least as of IOS 3.0, it may have changed.) so a call in to verizon may be required to switch the plan your on. I've dealt with this when switching between iphone, blackberry and android on my AT&T sim. That really depends on how the carrier sets up the plans
movielover76 said:
Actually sims can go bad, it's a computer chip and they can interfere with a lot of things on the phone, it's main purpose is for authenticating and utilizing the radio in the phone, so bad sim card = tons of connection issues.
I experienced it with an old AT&T sim which I used to switch between phones a lot. though micro-sim vs regualar sim is irrelevent, they are the same thing just cut different.
Just getting a new sim, either kind should fix the issue if you have a bad sim.
A simple sim swap will do the basic activation of the lte iphone when it comes out just like swapping androids.
The only exception is that iphones interface with voicemail and sometimes data differently (at least as of IOS 3.0, it may have changed.) so a call in to verizon may be required to switch the plan your on. I've dealt with this when switching between iphone, blackberry and android on my AT&T sim. That really depends on how the carrier sets up the plans
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I guess they don't make SIM cards like they used to be.
My mom's SIM card, which she was given back in 1995... yes, 1995, is still kicking and works just fine even after it's being clipped for MicroSIM across 20+ phones she had in the years.
bummer, i was hoping for someone to say that the micro was gonna be the bees knees... ( yall coulda lied, i believe in placebo's)
lmao
owell, guess i'll suffer with my oversized one lol
its easy to remove and replace i guess
MotoDj said:
bummer, i was hoping for someone to say that the micro was gonna be the bees knees... ( yall coulda lied, i believe in placebo's)
lmao
owell, guess i'll suffer with my oversized one lol
its easy to remove and replace i guess
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Lol, personally the regular Sim card are about the right size for me the micro ones I fumble around with and drop it a lot, lol.
Sent from my ADR6425LVW using XDA
I almost fell out of my chair when I read about the sim card doing bad reception. Even if one is going bad. Most chances are its is either going to work or it isn't. Not kinda work. A fellow Rezound owning friend and I was talking about this subject yesterday. I don't think cdma carriers have the whole sim card technology ironed out yet. I had ATT for many years and I never heard the stories of people needing to get sim cards swapped out because of something not working or because they changed phones like I have since I been with Verizon. Seems like just about every person who switches phones has to get a new sim card.
Hi all, I just bought a new Samsung S9 plus 256gb US version unlocked from Samsung's website and I have TMobiles unlimited one plan. The Sim card I got was in my old ZTE Blade V8 Pro unlocked (you can probably guess why I bought a new phone). After putting the SIM card in the new phone for about a few hours it was a night and day difference where places I tested my LTE speed was 30mbs verses 6-8 on the old phone and the internet loaded quicker.
However, later in the day I started getting no connection or slow speeds and sometimes got edge+ connections in places where even my crappy V8 Pro would get connections. I called TMobile and gave them my phone's emei number and the Sim number that I used. At first it worked better but I still get less bars of reception and there are times when it takes a while for a LTE connection when there is no wifi. I even get LTE+ and it will still load some things like twitch streaming slow.
Someone suggested flashing TMobile firmware to the phone to try help connecting to their network like their branded phone's, but I have no idea what file to download for TMobile firmware for Odin to flash. Also, would it help to get updates from TMobile faster? People who have a TMobile sold S9+ are getting the new delayed update but my unlocked phone isn't. Thanks for your time.
I can say with a great deal of confidence that flipping firmware will not resolve this problem. It sounds like a hardware issue to me.
Hi all, a couple random questions.
I spent the extra $30 on the LTE version on the off chance it would work with my Google Fi data only sim.
question is, i don't seem to have a sim slot, this looks like a micro sd slot to me. (the spot where a sim would go doesnt have a cut-out)
Am i missing something, or did i get the wifi only version?
Part B: If this does happen to be a wifi only version, it is even worth it to me to try to get them to exchange it, would it even have worked with Project Fi?
The LTE version has a different tray for sure - the sim card goes adjacent to the SD card, basically where that extra black area is. No idea about project FI, but my LTE tablet works in Toronto Canada on LTE pretty well.
Only the LTE Version has GPS. So try to use Google Maps
Hi!
Got my LTE version today and it sure looks different. I also had a sticker behind where it shows you, how to put micro sd AND sim-card into it.
Funny thing is, I even got a SIM card from China
thE_29 said:
Hi!
Got my LTE version today and it sure looks different. I also had a sticker behind where it shows you, how to put micro sd AND sim-card into it.
Funny thing is, I even got a SIM card from China
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Me too....but exist the way to let it work with European sim cards?
Why shouldnt it work with a european SIM?