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Just bought inspire do i need a 4g simcard?

Just bought an inspire from a friend, Do I need a 4g sim card or will my old 3g sim card work fine just wanna get the most out of phone Thanks. I live in Los Angeles

rob1216 said:
Just bought an inspire from a friend, Do I need a 4g sim card or will my old 3g sim card work fine just wanna get the most out of phone Thanks. I live in Los Angeles
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No, you don't. You may need to call at&t to have them set up your data feature.

The "4g" sim card is for lte, and this phone isn't capable of lte so no, as said above.

a few questions

i have a few question. i just bought my sensation. i would like to know if tmobile is going to charge extra for 4g usage conserding im using a 3g sim card. i read somewhere that 4g phones have different plans.
2nd is tethering free on the sensation and if not is there a way to make free (rooting or something)
3rd is there a way to disable 4g to improve battery

ariel123 said:
i have a few question. i just bought my sensation. i would like to know if tmobile is going to charge extra for 4g usage conserding im using a 3g sim card. i read somewhere that 4g phones have different plans.
2nd is tethering free on the sensation and if not is there a way to make free (rooting or something)
3rd is there a way to disable 4g to improve battery
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You should be able to stick with your current plan. That's what they did for me, and many other posters.
Are you actually seeing a 3G icon? What UL/DL speeds are you getting?
There's currently no way to disable 4G and force 3G. You can disable WCDMA, but that will force 2G only.

Tmobile's 4G is actually just 3G plus great marketing. You can disable 3G to help your battery but then you'd be down to just EDGE.

I am getting 4g service I was just wondering wether there was a 4g sim cand or something that would improve the spewed cause honestly its only a little faster. Also for some reason my Yahoo mail won't sync any sugggestions. And btw I'm loving this phoon coming from the hd7

xnifex said:
Tmobile's 4G is actually just 3G plus great marketing. You can disable 3G to help your battery but then you'd be down to just EDGE.
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So, to clarify, are you saying there's no protocol difference between TMO's 3G and "4G"? Is the TMO 4G just an upgrade in speed of the same 3G data connection? Since it seems there are 4G SIMs, and the IMEI needs to be registered as 4G, and the phone needs special HW and SW for 4G, I was under the impression that TMO's 4G is actually a different protocol.
I understand TMO's 4G does not meet the speed definition of true 4G, but it could still be using a separate data format and protocol than 3G.

On my phone so I really can't provide all the links and stuff but tmobile's
4G is hspa+ which is 3G tech. You can research more about it if you want.
sent from HTC Sensation

replace with sim only after 4g upgrade, it means i cannot use 3g now?

I have a us 3g xoom , cannot i use 3g yet? When i put sim card nothing happens.

You have a Us verizon xoom? If so there is no gsm modem to use the sim card. Its only a slot for the future 4g upgrade. You won't be able to do anything with a gsm sim card.
Sent from my SPH-D700 using XDA Premium App

After upgrade can i use it?

No, you need a completely different xoom model all together.

AT&T '4G' Sim cards increase Cappy Speeds??

Just received my new sim card SKU 73057 that enables '4g' phones to get access to the faux G network...
wondering if i register this new sim that it will increase down/up speeds?
Anybody have one of these new sims and what are your speeds?

Not likely, as the Captivate doesn't have a 4G radio built into it. Your other option is to flash an i9000 rom. That'll get you faster uplink speeds -HSUPA.
Sent from my SAMSUNG-SGH-I897 using XDA App

'4g' sim cards arent magical....
they dont actually provide any more bandwidth than a 3g because what matters is what is provisioned to your account. sim card doesnt mean squat. i have a cingular 3g and a new 4g sim card....same speed on each one. no matter what phone i try it on. inspire 4g, atrix 4g, gs2, captivate, desire z, etc

[Q] 4G Compatible xoom Rom?

is there ANY rom that is compatible with a 4G US xoom ? mine can as 4g out of the box.

nope. not yet.

...poopy cuz i really like my 4g 6mbps speed and i really dont want a stock rom