Repairing bricked Alcatel OT990 is easy with the RIFF Box. Phone is auto powered on with USB Cable connected to the PC. Battery presence is not required; moreover, if you’ll get connection errors, battery is not recommended at all.
To resurrect Alcatel OT990:
Solder JTAG cable to Alcatel OT990 JTAG pads;
Insert USB Data cable into board and PC;
Make sure Alcatel OT990 is selected in the list of models;
Click Resurrect button;
Choose which areas to flash;
Wait till software signals a successful operation completion;