Rank

Operator

Technology

Ownership

1

AIS

GSM, EDGE, EDGE+
UMTS, HSDPA, HSPA+, LTE

INTOUCH Company (42.60%)
Singapore Telecommunications (21.31%)

2

DTAC

GSM, EDGE
UMTS, HSDPA, HSPA+

Telenor (38.64%)
Thai Telco Holdings (25.59%)

3

True Move

GSM, EDGE

True Corporation

4

GSM 1800 (Digital Phone)

GSM

Advanced Info Service (98.55%)

5

True Move H (Hutch)

UMTS, HSDPA, HSPA+
CDMA2000 1x, CDMA2000 EV-DO Rev.A

True Corporation

6

CAT CDMA

CDMA2000 1x, CDMA2000 EV-DO Rev.A

CAT Telecom

7

WEPCT

PHS

True Corporation

8

TOT 3G

UMTS, HSDPA, HSPA+

Telephone Organization of Thailand (TOT)

9

MY

UMTS, HSDPA, HSPA+

CAT Telecom

 

The most common Sim cards used in Thailand are AIS, True Move, and Dtac.

1. AIS – available at service counters/ shops (eg. 7-eleven, Family Mart)

Website – http://www.ais.co.th/en/

2. Dtac – available to buy both at the companies of Dtac which can be seen in almost every shopping Mall and the convenience stores like 7-eleven

Website – http://www.dtac.co.th/en/

3. True Move – available to buy both at the companies of True Move which can be seen in almost every shopping Mall and shops

Website – http://truemoveh.truecorp.co.th/?In=en

Note- the rest of the Sim cards are not widely used and cannot be found to buy as easy as AIS, Dtac, and True Move.  It is also now Thai Law that you must present your passport upon purchase of your new Thai sim card.