adb shell "service call iphonesubinfo 1" requires permission

I used the following adb command to get the IMEI of android devices.

adb shell "service call iphonesubinfo 1"

But for HUAWEI MediaPad 2.0 this command returns the following output.

Result: Parcel(

  0x00000000: ffffffff 00000069 00650052 00750071 '....i...R.e.q.u.'

  0x00000010: 00720069 00730065 00520020 00410045 'i.r.e.s. .R.E.A.'

  0x00000020: 005f0044 00480050 004e004f 005f0045 'D._.P.H.O.N.E._.'

  0x00000030: 00540053 00540041 003a0045 004e0020 'S.T.A.T.E.:. .N.'

  0x00000040: 00690065 00680074 00720065 00750020 'e.i.t.h.e.r. .u.'

  0x00000050: 00650073 00200072 00300032 00300030 's.e.r. .2.0.0.0.'

  0x00000060: 006e0020 0072006f 00630020 00720075 ' .n.o.r. .c.u.r.'

  0x00000070: 00650072 0074006e 00700020 006f0072 'r.e.n.t. .p.r.o.'

  0x00000080: 00650063 00730073 00680020 00730061 'c.e.s.s. .h.a.s.'

  0x00000090: 00610020 0064006e 006f0072 00640069 ' .a.n.d.r.o.i.d.'

  0x000000a0: 0070002e 00720065 0069006d 00730073 '..p.e.r.m.i.s.s.'

  0x000000b0: 006f0069 002e006e 00450052 00440041 'i.o.n...R.E.A.D.'

  0x000000c0: 0050005f 004f0048 0045004e 0053005f '_.P.H.O.N.E._.S.'

  0x000000d0: 00410054 00450054 0000002e          'T.A.T.E.....    ')