[katamari201]

I just got a focus flash from ebay as well as an unlock code and put my t-mobile sim in the phone. However, when I enter the code and tap enter, it says "sim error". I can cancel the unlock prompt and go to the metro ui, and there's a little sim icon with a lock on it. If I take out the sim card and restart, instead of the unlock prompt, I get a little box that says "sim error" and a message about missing or invalid sim. The little sim icon at the top has a little (/) instead of a lock. What could be the problem? It also says no network found in the cellular section of the settings.

I've also tried trying to enter the mcc code of t-mobile into the phone, but other than being able to access diagnostics, many of the codes don't actually work for the Focus Flash. I think these codes were originally for the Focus and I can't find any special codes for the Focus Flash to access any of the special diagnostics functions.

[MR_Dat]

the same problem but i have sloved via this method
Unlock Codes for Samsung Focus Flash Mobile with Instant USB Delivery | Unlocking. | FastGSM