[OnePlus 5 Guides, News, & Discussion] zivan56:
Unfortunately, the CA combos are locked per MCC or MCC/MNC combo. Here is the what you get per provider in 4.5.6

USA - AT&T

30AA-29A-0

30AA-12A-0

30A-12AA-0

30AA-5A-0

30A-5AA-0

30AA-4A-0

30A-4AA-0

30AA-2A-0

30A-2AA-0

29A-2AA-2

17AA-2A-0

17A-2AA-0

12AA-2A-2

12A-2AA-2

5AA-2A-1

5A-2AA-1

4AA-2A-2

4A-2AA-2

2AA-2A-0

2CA-0

66AA-12A-5

66A-12AA-5

66AA-5A-0

66A-5AA-0

66BA-0

29A-4AA-2

17AA-4A-0

17A-4AA-0

12AA-4A-5

12A-4AA-5

5AA-4A-1

5A-4AA-1

4AA-4A-1

12BA-0

30AA-29A-4A-0

30A-29A-4AA-0

30AA-29A-2A-0

30A-29A-2AA-0

30AA-12A-4A-0

30A-12AA-4A-0

30A-12A-4AA-0

30AA-12A-2A-0

30A-12AA-2A-0

30A-12A-2AA-0

30AA-5A-4A-0

30A-5AA-4A-0

30A-5A-4AA-0

30AA-5A-2A-0

30A-5AA-2A-0

30A-5A-2AA-0

66AA-12A-2A-1

66A-12AA-2A-1

66A-12A-2AA-1

29A-4AA-2A-0

29A-4A-2AA-0

12AA-4A-2A-0

12A-4AA-2A-0

12A-4A-2AA-0

12AA-2A-2A-0

12A-2AA-2A-0

12BA-2A-0

12B-2AA-0

12AA-2C-0

12A-2CA-0

5AA-4A-2A-0

5A-4AA-2A-0

5A-4A-2AA-0

12BA-4A-0

12B-4AA-0

5AA-4A-4A-0

5A-4AA-4A-0

66AA-2A-2

66A-2AA-2

USA - Other

17AA-2A-0

17A-2AA-0

12AA-2A-2

12A-2AA-2

5AA-2A-1

5A-2AA-1

4AA-2A-2

4A-2AA-2

2AA-2A-0

2CA-0

66AA-66A-0

66AA-12A-5

66A-12AA-5

66AA-5A-0

66A-5AA-0

66CA-0

66BA-0

17AA-4A-0

17A-4AA-0

12AA-4A-5

12A-4AA-5

5AA-4A-1

5A-4AA-1

4AA-4A-1

12BA-0

41CC-3

66AA-66A-2A-0

66A-66A-2AA-0

66AA-12A-2A-1

66A-12AA-2A-1

66A-12A-2AA-1

66AA-2A-2

66A-2AA-2

12AA-4A-2A-0

12A-4AA-2A-0

12A-4A-2AA-0

12AA-2A-2A-0

12A-2AA-2A-0

12BA-2A-0

12B-2AA-0

12AA-2C-0

12A-2CA-0

5AA-4A-2A-0

5A-4AA-2A-0

5A-4A-2AA-0

4AA-4A-2A-0

4A-4A-2AA-0

66AA-66A-12A-0

66A-66A-12AA-0

66AA-66A-5A-0

66A-66A-5AA-0

66CA-66A-0

66C-66AA-0

66CA-1

2A-0

66C-12AA-0

66CA-5A-0

66C-5AA-0

12AA-4A-4A-0

12A-4AA-4A-0

12BA-4A-0

12B-4AA-0

5AA-4A-4A-0

5A-4AA-4A-0

66CA-2A-0

66C-2AA-0

Canada

7AA-5A-1

7A-5AA-1

7AA-4A-1

7A-4AA-1

7AA-2A-0

7A-2AA-0

7BA-0

17AA-2A-0

17A-2AA-0

12AA-2A-2

12A-2AA-2

5AA-2A-1

5A-2AA-1

4AA-2A-2

4A-2AA-2

2AA-2A-0

2CA-0

17AA-4A-0

17A-4AA-0

12AA-4A-5

12A-4AA-5

5AA-4A-1

5A-4AA-1

4AA-4A-1

12BA-0

7CC-2

41CC-3

12AA-7A-4A-1

12A-7AA-4A-1

12A-7A-4AA-1

7AA-4A-4A-1

7A-4AA-4A-1

41CA-41A-0

41C-41AA-0

41DA-0

12AA-4A-2A-0

12A-4AA-2A-0

12A-4A-2AA-0

12AA-2A-2A-0

12A-2AA-2A-0

12BA-2A-0

12B-2AA-0

12AA-2C-0

12A-2CA-0

5AA-4A-2A-0

5A-4AA-2A-0

5A-4A-2AA-0

4AA-4A-2A-0

4A-4A-2AA-0

12AA-4A-4A-0

12A-4AA-4A-0

12BA-4A-0

12B-4AA-0

5AA-4A-4A-0

5A-4AA-4A-0

12AA-7A-0

12A-7AA-0

41AA-41A-0

40CC-1

Japan

18AA-1A-1

18A-1AA-1

8AA-1A-2

8A-1AA-2

5AA-1A-1

5A-1AA-1

3AA-1A-0

3A-1AA-0

40A-5AA-1

40A-3AA-0

40CA-1

41AA-39A-0

41A-39AA-0

39CA-0

28AA-3A-1

28A-3AA-1

19AA-3A-0

19A-3AA-0

8AA-3A-3

8A-3AA-3

5AA-3A-4

5A-3AA-4

3AA-3A-0

3CA-0

41AA-41A-0

41CA-3

38CA-0

40CC-1

39CC-0

41CC-3

41C-1AA-0

26AA-3A-1A-0

26A-3AA-1A-0

26A-3A-1AA-0

19AA-3A-1A-0

19A-3AA-1A-0

19A-3A-1AA-0

40A-5AA-3A-0

40A-5A-3AA-0

40C-3AA-0

41CA-39A-0

41C-39AA-0

8AA-3A-3A-0

8A-3AA-3A-0

41CA-41A-0

41C-41AA-0

41DA-0

19AA-1A-0

19A-1AA-0

26AA-1A-1

26A-1AA-1

41A-1AA-0

26AA-3A-1

26A-3AA-1

Rest of the world

20AA-1A-0

20A-1AA-0

7AA-1A-0

7A-1AA-0

5AA-1A-1

5A-1AA-1

3AA-1A-0

3A-1AA-0

40A-5AA-1

40A-3AA-0

40CA-1

28AA-3A-1

28A-3AA-1

20AA-3A-0

20A-3AA-0

8AA-3A-3

8A-3AA-3

7AA-3A-1

7A-3AA-1

5AA-3A-4

5A-3AA-4

3AA-3A-0

3CA-0

28AA-7A-2

28A-7AA-2

20AA-7A-1

20A-7AA-1

8AA-7A-2

8A-7AA-2

7AA-7A-0

7AA-5A-1

7A-5AA-1

7CA-2

7BA-0

41CA-3

38CA-0

40CC-1

7CC-2

20AA-3A-1A-0

20A-3AA-1A-0

20A-3A-1AA-0

7AA-3A-1A-0

7A-3AA-1A-0

7A-3A-1AA-0

40A-5AA-3A-0

40A-5A-3AA-0

40C-3AA-0

28AA-7A-3A-0

28A-7AA-3A-0

28A-7A-3AA-0

20AA-7A-3A-0

20A-7AA-3A-0

20A-7A-3AA-0

8AA-7A-3A-0

8A-7AA-3A-0

8A-7A-3AA-0

8AA-3A-3A-0

8A-3AA-3A-0

7CA-3A-0

7C-3AA-0

5AA-3C-0

5A-3CA-0

28AA-7C-0

28A-7CA-0

41CA-41A-0

41DA-0

Quite frustrating that virtually all Qualcomm devices are locked per region like this, so you can't take full advantage of the hardware.

For example, in Canada, B29/B30 is used, but it is locked out if the phone is in Canada.