Default [Q] Trouble at Baseband Version I8160

hii there

please help me. when I downgraded my phone to GB then upgraded to JB, the baseband version of my phone still not changed the baseband version of my phone is still not changed, because the baseband version still DXMA1 (GB) can not install any ROM
well am instal any ROM handphone lose signal and sim card eror because my phone baseband version unknown
Attached Thumbnails
Click image for larger version

Name:	JB ACE 2.jpg
Views:	664
Size:	31.3 KB
ID:	2483031