Does reinstalling the Prepaid APN using the Happy Prepaid App, restarting your handset or placing your SIM Card in another handset help resolve this issue?
If this doesn't help, please send me your full name, NRIC/FIN/Passport number and your Prepaid Number via Private Message and I'll be in touch.
I did the follwoing thing, thank you.
Why can't I surf on my phone after I returned home?
If you are an iOS user, after you switch back to a non-StarHub Prepaid SIM, kindly delete the Profile “StarHub Prepaid APN” from phone Settings -> General -> Profiles to continue using your home SIM data.
If you are an Android user, after you switch back to a non-StarHub Prepaid SIM, kindly set your APN back to your home APN settings.