Added in API level 1

android.telephony.gsm

Provides APIs for utilizing GSM-specific telephony features, such as text/data/PDU SMS messages.

Classes

GsmCellLocation This class was deprecated in API level 31. use CellIdentity. 
SmsManager This class was deprecated in API level 4. Replaced by android.telephony.SmsManager that supports both GSM and CDMA. 
SmsMessage This class was deprecated in API level 4. Replaced by android.telephony.SmsMessage that supports both GSM and CDMA. 
SmsMessage.SubmitPdu This class was deprecated in API level 4. Use android.telephony.SmsMessage. 

Enums

SmsMessage.MessageClass This enum was deprecated in API level 4. Use android.telephony.SmsMessage.