Hi,
Did you tried to read warning in support area about sp-locked C261 flashing ?
If you have backup (before flashing) - send it to
[email protected]
If you don't have backup - tell me to what network this phone was locked (network code).
If you don't know original lock network - read flash and send to
[email protected]
We will prepare some files for you to return phone in it's original state.