Concatenated message not parsing properly specially message with data header

Concatenated message not parsing properly specially message with data header

First message: bold text are unexpected character é@ø@/ @ Hello this is just a test sms from Mostain Billah personal phone, to verify multiple concatenated messaging system. Weather it is working or not. We hope

Second Message: bold text are unexpected character é@ø@/¡@ this is working so see how it works from the beginning....