Nuvi 660 kept losing satellite reception

 

Drove up to Kuantan , Fraser's Hill last weekend (8 Jun ~ 14 Jun) fr Singapore.

My 660 kept losing satellite reception (in open space eg along NS H'way)) , only to recover reception after 5 min to an hr. Checked the sateliite screen of the 660 and notice the reception keeping resetting iteslf (meaning lose entire connection and reconnect back, at times successful, at times fail thus lost reception). Problem went away in south johor and singapore.

Could it be the set problem? Hope the expert here can advice.