Android iphonesubinfo

I have issues using service call with su and without su

using adb on device console:

su -c service call iphonesubinfo 5 i32 1 returns

Result: Parcel(
0x00000000: fffffffc 00000023 00740041 00650074 '....#...A.t.t.e.'
0x00000010: 0070006d 00200074 006f0074 00670020 'm.p.t. .t.o. .g.'
0x00000020: 00740065 006c0020 006e0065 00740067 'e.t. .l.e.n.g.t.'
0x00000030: 00200068 0066006f 006e0020 006c0075 'h. .o.f. .n.u.l.'
0x00000040: 0020006c 00720061 00610072 00000079 'l. .a.r.r.a.y...'
0x00000050: 00000000                            '....            ')

service call iphonesubinfo 5 i32 1 returns

Parcel(
0x00000000: 00000000 0000000f 00350043 00330035 '........0.1.2.3.'
0x00000010: 00370033 00210031 00310043 00380036 '..4.5.6.6.7.8.'
0x00000020: 00100017 00010037                   '.7.0...        ')

is there any extra permissions that needs to granted for su ?