Default Is l900 esn on the daughter board?

Ok. I have l900 with a busted antenna connection on the board. That little title popped off so easy I can't believe it. I have another l900 I can not for the life of me get to connect to dfs. Can I just pull the daughter board from this one and put it on that one like swapping a cdma sim? If not why the heck won't my l900 connect to dfs? Changed out a working usb used in another phone and still no go. Ljc to ne2. Still no dfs reading. I can connectto the port just fine but searches pphone for ever.i even went stock and let ota take me to ne2. Still no go. Mc2 stock count reset still no go. 4.3 no go. Sec is all 000000. Idk wtf. Already put that l900 on boost mobile but no sprint here. Only option may be to get an electronics shop to replace the connection. Idk wtf. Help me to get my l900 connected to dfs like this busted l900 does and I won't worry about anything.