Hi guys...I'm new here but I've been using S3 almost 4 months..

I'm having dis trouble but I'm not sure whether its because of of my phone or because of telco provider..

My problem is I can't make/recieves calls in GSM/WCDMA Auto mode. If I'm lucky enough, my calls got thru for only a few seconds. Then..it will hang up automatically and call ended. If someone calles me, that call surely won't go through at all. A few minutes later, MAXIS sent 1 SMS to notify me that a had a missed call.

After a few experiments, I noticed that if I change the mode to GSM only....The calls will be like normal. so, the problems are WCDMA/ 3G network. But I dont want to set it to GSM mode all the time coz I'm using data plan. 1 more..Internet sometimes are very slow even H+...

I read some forums outside Malaysia..and some of s3 users experiencing this problems..is it because of the recent JB update?

Anyone else experiencing this?Or am I the only one in Malaysia who are having this problems? =)

and back to the main question.. Is it because of my device or Telco?

I've tried hard reset, change sim card but still no use. I'm running on JB n not rooted...Oh, I live in KL..

Thanks in advance guys..

Yeah...I'm on maxis...