Hi,
It's better to save to your database in BLOB, binary, than encoded in base64, cause it will be about 4x bigger.
Base64 is used for transfering usually, internally, binary is better
else is:
B4X:
Dim Encoded64 as String
Dim Conv As ByteConverter
Encoded64 = su.EncodeBase64(Conv.StringToBytes(Decode_gsm,"UTF-8"))
' Save the Encoded64 into your database field