Cannot properly get into fastboot mode.

[#1]

Hi all.

I'm trying to unlock the bootloader but cannot seem to get into fastboot mode properly

I power off the phone, hold down volume up and connect the USB lead as per instrustions.

The indicator LED will show blue (which I believe is to indicate fastboot mode), but then goes red and then green.

Green I understands as the battery is fully charged but I'm not sure what the red is for as I think this is stopping the fastboot drivers from installing/loading.

If I watch Windows' Device Manager during the process, I can see that a new device names "S1Boot Fastboot" is created under "Other devices" but this disappears when the blue LED switches.

Device Maneger then has not references to ADB or Fastboot that I can see and if I try the Fastboot version check, I just get "< waiting for device >"

Can anyone tell me where I'm going wrong?

I've tried this on Win7HP x64 and Win7Corp x86 both with SP1 with the same results.

Cheers.

[#2]

OK, finally manged to get the ADB drivers installed.

1. Get the driver and Fastboot package from this here - http://androidlegend.com/how-to-unlock-bootloader-of-sony-xperia-p-lt21i - and unpack some where

2. Have Windows Device Manager screen up and ready

3. Hold volume-up and plug USB cable in as usual - "S1Boot Fastboot" device should popup on Device Manager with exclaimantion icon; quickly right click and choose "Update Driver Software..." before the list refreshes and the device disappears

4. Choose"Browse..." -> "Let me pick..." - > "Have Disk..." -> navigate to the usb_driver folder you unpacked in step 1 and hit ok.

5. You should then see two devices; select the Fastboot from there.

Next time you try to use fastboot, the phone should stay in blue fast boot mode and "> fastboot devices" will list the phone.

[#3]

Spoke too soon

Works on my Win7 x86 machine but not my x64; what a pain.

[Nix_24]

i completely followed the instruction given here,still there is a message saying 'waiting for device'

what to do now??

[raczgHUN]

try plugging in your device into another usb. I have the same problem, once my phone recognized, i cant use the same usb if i want to flash my device..