topic Re: Not connecting to LTE. in Z Series

Not connecting to LTE.

MaxiRiver1988 — Sun, 08 Mar 2015 18:09:00 GMT

Hi guys. Here's my problem.

I'm from Argentina, where LTE only works with Band 4 (1700/2100). I bought the 6653 version witch don't have 1700... so i can't connect to LTE.

Is there any chance to unlock that frequency so i can connect to LTE? Rooting the phone? Installing a new O.S. from another country? How?

Thank you very much!

Re: Not connecting to LTE.

Uliwooly — Sun, 08 Mar 2015 18:12:38 GMT

It's not about unlocking as its a hardware limitation, in other words if you want your phone to work with that carrier/network you will need a phone that support that band (4)

Re: Not connecting to LTE.

Uliwooly — Sun, 08 Mar 2015 18:13:45 GMT

700/800/850/900/1700/1800/1900/2100/2600 (Bands 1, 2, 3, 4, 5, 7, 8, 13, 17, 20) - D6603

700/800/850/900/1700/1800/1900/2100/2600 (Bands 1, 2, 3, 4, 5, 7, 8, 17, 20) - D6643

700 / 850 / 900 / 1800 / 2100 / 2600 (Bands 1, 3, 5, 7, 8, 28, 40) - D6653

700 / 1700 / 1900 / 2100 (Bands 2, 4, 12) - D6616

Re: Not connecting to LTE.

Thommo — Sun, 08 Mar 2015 18:13:46 GMT

I believe it's a chip that determines what bands it works on however search XDA to see if there is a way of doing it but I doubt very much it is possible

Re: Not connecting to LTE.

JakeSully — Sun, 08 Mar 2015 19:31:54 GMT

It wont work since i think sony has diffirent chip for 3G and such i think it's one named after Qualcomm cpu chip, so mostlikely it wont be possible to use LTE at all on your device and unlocking it in Android does not help it will mostlikely fail to read for any LTE.

Re: Not connecting to LTE.

MaxiRiver1988 — Sun, 08 Mar 2015 19:54:10 GMT

Thank you guys.

Now my question is: Why Sony sell so many different versions of the same phone? It's not easier to sell a phone with ALL BANDS available and done?.

And, the other question is:

There are any other differences between D6553 version and the, for example, D6503 version? Apart from the frequencies.

Re: Not connecting to LTE.

Uliwooly — Sun, 08 Mar 2015 19:57:03 GMT

Exactly the same phone just the 4G LTE frequencies. There might be few extra apps or few less apps, this varies per region/ network.

Re: Not connecting to LTE.

MaxiRiver1988 — Sun, 08 Mar 2015 23:28:53 GMT

So, for the next time, if i'm buying a Cell Phone from USA or Europe (Living in Argentina) i should pick the version with more frequencies at all?

This doesn't make sense in the way Sony makes them exactly the same but with less frequencies. Why they do that? Who will buy a D6653 version if there is a D6603 version that it's the SAME, costs the same money and have more frequencies?

Re: Not connecting to LTE.

Thommo — Mon, 09 Mar 2015 01:05:44 GMT

Samsung do the same as to do lots of other manufactures so not just Sony - different countries have different laws and one phone does not fit all

Re: Not connecting to LTE.

Uliwooly — Mon, 09 Mar 2015 01:14:37 GMT

Just check the frequencies before you buy it, for the most part the USA version should be oK.

What thommo said its correct other companies do rhe the same, just Google around

Re: Not connecting to LTE.

MaxiRiver1988 — Mon, 09 Mar 2015 02:23:00 GMT

Yes i know Sony isn't the only one.

But well... thank you very much guys!

Case closed.

Re: Not connecting to LTE.

Uliwooly — Mon, 09 Mar 2015 02:36:41 GMT

Anytime

Re: Not connecting to LTE.

JakeSully — Mon, 09 Mar 2015 11:47:35 GMT

there is 1 thing samsung doesen't do, if you buy an samsung phone from USA then that phone will only work within USA so if you travel to Sweden or any EUrope country the risk is that phone wont recive any signal, thats because samsung doesen't use same type of antenna as Sony does. So sony is good since they use an antenna that supports all bands on D6603 so if you buy it in Europe it will work fine in china, Russia, USA and all other countries without any issues. Also it's not also due to antenna as well it's that Samsung made USA phones only working within USA while Europe models only work within Europe, while sony supports both.

I know this because where i practice there is 2 companies 1 pc repair side and other is phone repair side and some american person came to us asking why their samsung s4/s3 didnt recive any signal and we told them that samsung doesen't support European bands if it's bought in USA so yeah.

Re: Not connecting to LTE.

wch — Thu, 12 Mar 2015 02:44:07 GMT

This thread from XDA is teaching how to unlock Qualcomm bands.

http://forum.xda-developers.com/crossdevice-dev/sony/thread-progress-please-leave-im-updating-t2871269

But do it at your own risk.

Re: Not connecting to LTE.

JakeSully — Thu, 12 Mar 2015 14:37:35 GMT

won't work if you unlock the LTE Band it's mostlikely antenna in phone has no compatibility for LTE so not usefull really.

Also they might install diffirent Band chip as well so D6603 has one with LTE compatiblity and so while D5603 or w.e it was do not have that chip it has another chip so it limits it's self down to 3G only so unlocking firmware to use LTE will give you no LTE anyway. on a phone that don't have LTE compatibility.