India 3T - 4G/LTE not working in US

[kvssenthil]

Hi,
I bought an one plus 3T in india and brought it to US. I'm getting only E not even 3G. When I enquired in T mobile/lyca store, i was told that india unlocked mobile won't support the US bands. Network upgraded. It was big surprise to me. Please suggest me how to unblock additional LTE bands in my 3T mobile.

 

[pitrus-]

That's not possible, you should trade your 3t A3003 for a 3t A3000 American band-unlocked model.

Check the specifications for each model under connectivity.

https://oneplus.net/us/3t/specs

 

[thes3usa]

Wait, what?
I live in Sri Lanka (Tiny country below India) and my 3T is the Indian device. I toured Europe for 2 weeks, and I used an O2 Sim, and used LTE in Europe for the whole time I was there. Have you tried going to Settings, and selecting "LTE/3G Only"? That may fix your issue.
I swear, there should be no issue with the bands.

 

[smokin901]

Wait, what?
I live in Sri Lanka (Tiny country below India) and my 3T is the Indian device. I toured Europe for 2 weeks, and I used an O2 Sim, and used LTE in Europe for the whole time I was there. Have you tried going to Settings, and selecting "LTE/3G Only"? That may fix your issue.
I swear, there should be no issue with the bands.

India uses FDD 850, 1800 and TDD 2400. Most of the Europe uses TDD 1800. So you getting LTE in Europe is not a surprise.

USA uses 700, 1700, 1900, 2100, 2300
Varies with MSP

You will at least get 3G with T-Mobile and AT&T


Sent from my ONEPLUS A3003 using Tapatalk

 

[nikhil.agrawal]

Wait, what?
I live in Sri Lanka (Tiny country below India) and my 3T is the Indian device. I toured Europe for 2 weeks, and I used an O2 Sim, and used LTE in Europe for the whole time I was there. Have you tried going to Settings, and selecting "LTE/3G Only"? That may fix your issue.
I swear, there should be no issue with the bands.

Europe and india uses the same bands. I lived in uk and used the uk phones in india and indian phones over there. Its the states that uses different frequencies so most of phones don't work properly outside states.

 

[thes3usa]

India uses FDD 850, 1800 and TDD 2400. Most of the Europe uses TDD 1800. So you getting LTE in Europe is not a surprise.

USA uses 700, 1700, 1900, 2100, 2300
Varies with MSP

You will at least get 3G with T-Mobile and AT&T


Sent from my ONEPLUS A3003 using Tapatalk

Europe and india uses the same bands. I lived in uk and used the uk phones in india and indian phones over there. Its the states that uses different frequencies so most of phones don't work properly outside states.

Ah, thanks for clearing that up for me. I had no clue that it uses the same bands.

 

[redpoint73]

Ah, thanks for clearing that up for me. I had no clue that it uses the same bands.

Compatibility of phones with the cell networks in the US are a total pain in the you-know-what. We have 4 different major carriers, all using different bands (a little bit of band sharing, but most completely different) for 3G and LTE (GSM is a little more standardized thankfully). Basically, as a general rule if a device not intended/designed to work on US (and depends on which exact US carrier), you are probably going to run into some incompatibilities (no 3G or no LTE, or limited connectivity).

 

[thes3usa]

Compatibility of phones with the cell networks in the US are a total pain in the you-know-what. We have 4 different major carriers, all using different bands (a little bit of band sharing, but most completely different) for 3G and LTE (GSM is a little more standardized thankfully). Basically, as a general rule if a device not intended/designed to work on US (and depends on which exact US carrier), you are probably going to run into some incompatibilities (no 3G or no LTE, or limited connectivity).

Talk about synchronicity eh? But do the difference in bands give any speed differences, or call clarity? In the blind about these stuff, coming from a country that has only one carrier out of five who is still beta testing VoLTE.

 

[redpoint73]

But do the difference in bands give any speed differences, or call clarity?

Not an expert, and had to Google that. From what I'm reading, lower frequency (MHz) has better penetration (through buildings, etc.) while higher frequency bands have higher data capacity.

 

[pk-air]

There are steps on how to unlock additional bands. There are like 50 steps. I dont remember where I've seen it but if you google how to unlock bands on OnePlus you will find it. Also try to flash Oxygen OS from US web site which I see no reason to work but just a suggestion lol

 

[pitrus-]

Also try to flash Oxygen OS from US web site which I see no reason to work but just a suggestion lol

There are no region specific versions of OxygenOS, so this will do nothing but reflash the latest update.

 

[thes3usa]

There are steps on how to unlock additional bands. There are like 50 steps. I dont remember where I've seen it but if you google how to unlock bands on OnePlus you will find it. Also try to flash Oxygen OS from US web site which I see no reason to work but just a suggestion lol

There are no steps at all. You cannot "unlock" bands, as they're hardware related. There's no way to switch bands out of the blue.

 

[pk-air]

There are no steps at all. You cannot "unlock" bands, as they're hardware related. There's no way to switch bands out of the blue.

No you can't switch but you can unlock some bands which might help

https://forum.xda-developers.com/oneplus-3/how-to/guide-unlock-additional-lte-bands-t3519563

---------- Post added at 09:23 PM ---------- Previous post was at 09:16 PM ----------

There are no region specific versions of OxygenOS, so this will do nothing but reflash the latest update.

as I said I dont see any reason for it to work

 

[redpoint73]

There are no steps at all. You cannot "unlock" bands, as they're hardware related. There's no way to switch bands out of the blue.

At one time that was true. But for Qualcomm SoCs, the band support stopped being set in hardware (at least for the most part) some 3 years ago with Snapdragon 801 (or maybe earlier, but definitely with 801). Support for all or most bands (might be some exceptions) used worldwide is there, but the specific bands are enabled in firmware.

https://www.qualcomm.com/products/rf

That said, enabling bands is a long process as noted; and has the risk of resulting in a radio brick. So it's best to buy the correct region version OP3T (which supports the needed bands out of the box) when possible.

 

[knpk13]

At one time that was true. But for Qualcomm SoCs, the band support stopped being set in hardware (at least for the most part) some 3 years ago with Snapdragon 801 (or maybe earlier, but definitely with 801). Support for all or most bands (might be some exceptions) used worldwide is there, but the specific bands are enabled in firmware.

https://www.qualcomm.com/products/rf

That said, enabling bands is a long process as noted; and has the risk of resulting in a radio brick. So it's best to buy the correct region version OP3T (which supports the needed bands out of the box) when possible.

Why aren't all bands just enabled by default then? I don't understand why there are different models for different regions.

I have a US OP3T and I'm visiting India. It''s working with Jio in India (although it supports only only of the 3 bands used by Jio) but VoLTE doesn't work for some reason.