Siemens ST55 Service Manual page 22

S I E M E N S
ST55 Level 2 Service Manual
GSM Test:
Connect the mobile/board via internal antenna (antenna coupler) and external
antenna (car cradle) to a GSM tester.
Use a Test SIM.
Skip GSM 900/GSM1800 or GSM1900 test cases if not performed by the mobile
phone.
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