Mobile network roaming in Thailand

Definition of mobile network roaming
Mobile network roaming is using a network outside home provider outside home country. For example let's say you're travelling to Thailand from Malaysia. You no need to switch SIM when you reach to Thailand. But you need to pay expensive when you make calls, SMS or internet or buy internet pass if you want surf more.

Normal rates (calls/SMS/internet roaming)
Internet, SMS and calls are more expensive than using home network or using local SIM in Thailand.
 * RM3/min for calls (both Malaysia and Thailand within Thailand including receive calls)
 * RM2/SMS (both Malaysia and Thailand within Thailand)
 * RM5/mb (Thailand only)

Digi-DTAC rates
Note: all plans above requires Digi prepaid SIM card and using DTAC networks. If you use postpaid, you'll get free 5GB data roaming and 60 minutes calls per month for free if you're using plan RM120 and above.
 * 50sen/min/SMS to Digi-Dtac, Digi-Digi, Digi-other Thailand providers, Digi-Malaysian providers only
 * RM5/50mb/24 hours (free unlimited internet to social massaging)
 * RM25/4GB/72 hours (includes 60 minutes calls)
 * RM5/200mb/7 days
 * RM15/500mb+10 minutes calls/day

U Mobile-True Move rates
* Limit to 500mb/day. After reach 500mb data will slow down to 64kbps.
 * RM10/day unlimited data*