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utils.py: Fix for parsing MNC

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This commit fixes the incorrect parsing of MNC from PLMN.
Previously its was parsing PLMN string 130062 as MCC 310 MNC 260,
whereas it should be MCC 310 MNC 026.

(The SIM was programmed with MCC 310 and MNC 026)

Change-Id: I799469206f87e930d8888367890babcb8ebe23a9
This commit is contained in:
herlesupreeth
2021-02-11 06:59:29 +01:00
parent cebf8b198b
commit bdf3d3597b
1 changed files with 3 additions and 3 deletions
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6
pySim/utils.py
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@@ -137,9 +137,9 @@ def dec_mcc_from_plmn(plmn):
def dec_mnc_from_plmn(plmn):
ia = h2i(plmn)
digit1 = ia[2] & 0x0F # 3rd byte, LSB
digit2 = (ia[2] & 0xF0) >> 4 # 3rd byte, MSB
digit3 = (ia[1] & 0xF0) >> 4 # 2nd byte, MSB
digit1 = (ia[1] & 0xF0) >>4 # 2nd byte, MSB
digit2 = ia[2] & 0x0F # 3rd byte, LSB
digit3 = (ia[2] & 0xF0) >> 4 # 3nd byte, MSB
if digit3 == 0xF and digit2 == 0xF and digit1 == 0xF:
return 0xFFF # 4095
return derive_mnc(digit1, digit2, digit3)