How to check Broadband 'Mobile Connect' faulty?

How to check this little ‘mobile connect’ faulty?

Sometimes there’s a connection but cannot surfing internet after 3 -4 hours online. Broadband problem or the little ‘mobile connect’ faulty?

i think its celcom connection problem… its connect but can’t surf right?

you could try another modem. but like moon says, its probably the connection.

yeah…connection very not stabil ryte now