how to fix sam j2 core not registered on network

2:20

3:07

21:14

11:21

3:45

7:07

2:53

11:54

کوتاه

13:42

9:35

4:54

9:37

17:16

4:50

1:19

1:47

3:17

8:43

6:33

2:23

1:06

2:57

6:01

6:17

7:51

2:59

5:51

11:43

2:18

6:16

6:02

5:08

کوتاه

8:13

4:04

2:59

3:04

1:57

28:34