Help! Sony Z1 - XDA Assist

Hi there,
I'm new to this forum so, before I say anything, I must apologize in advance in case i'm breaking any rules, and for my english.
I'm from Argentina and my brother brought me an unlocked Sony Z1 (L39h) from USA about a month and a half ago, since it's much cheaper over there. But I haven't been able to use it at all.
At first, the touchscreen didn't work properly. It recognized ghost touches all around the screen, that already made it impossible to use. So I went to sonymobile.com and checked in the support forums. One of the possible solutions was to upgrade to lollipop (it came with kitkat I think). Nothing happened and lollipop seemed to consume a lot more battery, so I decided to downgrade.
And thats when It all started.
I couldn't seem to get any signal. And even If I did with another firmware, I couln't make any phone calls, and if I turned the phone off, again no signal for 24 hs approximately.
I kept trying with other ftf files using flashtool, xperifirm o with direct downloads. No luck. I even lost the baseband number (or something like that) and IMEI. I must have tried like 50 different firmwares.
At first I thought mine was a C6903, but yesterday I realized it is a L39h. Tried again with specific firmwares for the model, but unsuccesfully again.
So, to sum up:
1- Touchscreen Problems
2-No signal, No phone calls (at first I could receive and make them, before I f***ed up with firmwares)
3- No baseband, no IMEI.
4- Don't know which is the original firmware that came with the phone.
I would really appreciate any help. Thanks for reading and in advance!

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Hi !
Are you sure is a Samsung device ?
Check on the manufacturer`s website or ask here https://forum.xda-developers.com/android/help
Cheers !

(Help!) moto g xt1040 no signal

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I just went on a trip and realized data roaming is not working either.
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With the other phone/ROM I never had issues.
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I've read some time ago that rooting 7.0 on P9000 is kind of risky or doesn't work altogether.
Is this still true?
Do you recommend any specific instructions to do it? (I've rooted and installed ROM's in other phones, so not newbie but no expert either).
Which ROM would you recommend as of today?
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https://forum.xda-developers.com/galaxy-s8+/how-to/guide-flash-oreo-g955fxxu1crb7-using-t3755789
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My M2 says it is a Blackberry.

hi, This is my first post. No, i am not an Android developer. I just have a weird Xperia D2306 phone. I don't think it is an Aqua. Pretty sure it would die a sad death if I dropped it in some water. Bought it unlocked from a little store in a little town in Ontario Canada bout 4 years ago when my almost new Xperia Z (which was waterproof) got stuck between a jeep and a hard place when it was just into a 3 year contract. kept the Z on life support long enough to use the Sony PC Companion to migrate everything to the second hand M2.
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"No software found. Authentication failed. Software update or repair of prototype devices is only allowed from specific IP addresses."
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Q2 - would I have better chance by learning show to use the tools to flash a stable custom ROM from here
Q3 - Anyone want to trade for another Xperia?
I can probably figure out how to upload screenshots if there is anything specific anyone wants to see that can help. Or i can key in what I see.
:fingers-crossed:
Alan
just flash latest 5.1.1 firmware (.182) with flashtool.

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