in wp7504 it is mentioned that SIM _DETECT pin requires a translation for detection
The UIM Detect signals transition:
•When a UIM is inserted — high (logic 0 to logic 1)
•When a UIM is removed — low (logic 1 to logic 0)
but as shown in the digram in the check list when sim is inserted a low (logic 1 to logic 0) will be sensed by the chip and when removed the internal pull up becomes active high (logic 0 to logic 1) both the data are conflicting and it is also mentioned that if detect is not used the pin should be connected to ground ?