(help) x10 strange problem - XPERIA X10 Q&A, Help & Troubleshooting

well first of all thanks for your help in advance.
I had a good x10 and decided to sell it and buy a new one because mine is already a bit scratched and other things the former was a X10A and now I have an X10 if that matters somehow.
good considering the x10 in hand I decided to update it first modific to 2.1 with good first non-tariff flashtool restarted. do it again and go for a while whether the network data set, each time an application instalava stuck and restarted.
after that does not solve the problem only 2g sailing. to make root was another problem with me probelam flastool was a play. remove the battery and leave it outside for a while. then again in the place lit if root root but the best was with superclickone.
then install the recovery well to try to install a different rom.
1.7 of laversion install it in my previous trip Experia worked perfectly.
and reboot several times but the biggest mistake was that he recognized me in any froyo memory told me that was not there I thought that was the only rom that fallava but try other froyo and I recon all the phone memory.
the formative and other things and not do anything.
I hope you can help me thanks.
well first of all thank you all for your time
baseband good use the 49 is the one used in the above and it worked well but you're right, maybe because it was for America proves with another 67 or more.
well that was installed with the Sony Ericsson flashtool X10i_2.1.1.A.0.6_CUST GENERIC-TH 1237-0336
root and then install other froyo over several people and doing the problem is restarted as long as I showed the worst memory.
rom froyo good at baseband always use 49 did not try other that could have caused this problem but I do not recognize the memory in the rom do not understand.
But the most curious .. I can restart the telefonoy xrecovery enter a bone having a rom froyo I recognize the memory but when it does not appear but entered the xrecovery if I have it and I can see all of it I install anything but get nothing.
Also if you want to install a backup does not work xrecovery entered the xrecovery give restore Begins choose the copy and paste to work then restarts and I lose everything because the phone does not come over and touch me again with the flashtool.
to light in the rom 2.1 if you recognize me in rom memory but I do not like froyo recognize the memory but still recognize it when I enter the xrecovery and I can see what is memory and install things that are in but when I restart it and entered into the system memory does not recognize me tells me no memory mounted.
thanks for everything

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I'm sorry but I don't understand EXACTLY what your problem is. I understand that you used to have an X10a but now you have an X10i. Is that correct?
You have a problem because you have no 3G? Are you aware that an X10i has different 3G radio than an X10a?
Maybe you should tell where you are using your X10 and what your carrier is.

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For what i can understand he used to have a X10a and now he has a X10i, he was using 2.1 before and now he is using a custom Froyo ROM.
The problem i think he has (besides this is written in "engrish" ) is that his Froyo ROM doesn't recognize the SDcard, but still xrecovery does recognize de SDcard.
He says that he has tried with other Froyo ROMS but he still has the same issue.
When he does a xrecovery backup his phone always crash and loses everything in SDcard.
Corrupted SDcard, maybe? o.o
Try reformatting your SDcard on your PC with FAT3 at 4clusters or something ._.

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OK, I got that. Then as CescVicious says, you should:
1. Go into recovery, mount the SDcard and copy the entire contents of the card to PC
2. Repartition and format SDcard either from recovery or PC. I would make sure there is no ext partition just in case.
3. Copy the backup you just made back to SDcard
4. Reboot and see what happens
If the problem still continues, I would try a different SD card to see if it shows the same behavior.
Or am I still missing something here?