Obnovitj Android Samsung Ace Gt S5830i 236 Do 404

Hello every body. I'm new here. And i want you to help me. I have Samsung galaxy Ace gt-s5830i. It works fine until i flashed it with a new ROM. Now it show a circle icon instead of network signal. And i can't make calls or recieve them even emergency calls.

36 0.01% 36 0.01%. 27 0.00% 27 0.00%.

I tried to flash a stock ROM but it always give the same problem. Gnuboy gx channel installer. I tried a lot of methods in the Internet without result. The Only things that gone is the network connection.

The IMEI remains the same and wifi mac address. Thank you and sorry for bad English.