im using Digi..if its telco issue my wife phone also will face same issue..the weird is i can say every time after rebooted the phone then only the connection back to normal..even tried to turn off the Mobile Data for awhile then turn it on will not solve the connection issue..it happened 3-4 times already..

we both using Digi...hmm could be Digi issue also  ...another thing i also spotted..sometime my phone didn't received any update from my whatsapp/wechat/fbmessenger notification..only when i open one of the app it will popup all the notification from all apps...i never use Airplane or Low Power mode..

yeah been using that a lot as i frequent SG a lot this year

but still doesnt beat their singtel roaming on malaysia side ... SGD10 for 1GB every month ... auto billing

dollar to dollar  - that deal is way better lo

and maxis still charges RM30 for a day of roaming