Known incompatible carriers

(Please note that often a phone carrier will have more than one Gateway, so even if your phone carrier does appear on this list, it is still possible that it will work through another gateway)
 

Country            Company                  Gateway              Prefix

Argentina Telefonica Movistar @movistar.net  
Austria T-Mobile Austria @sms.t-mobile.at 43676
Bermuda Mobility @ml.bm  
Brazil Nextel @nextel.com.br  
Canada Fido / Microcell @fido.ca  
Canada Bell Canada @bellmobility.ca  
Canada Telus @msg.telus.com  
Germany E-plus @smsmail.eplus.de  
Germany Mannesmann Mobilefunk @d2-message.de  
India Idea Cellular @ideacellular.net 9822
India Idea Cellular @ideacellular.net 9824
India Idea Cellular @ideacellular.net 9848
India BPL Mobile @bplmobile.com 919843
India BPL Mobile @bplmobile.com 9821
India BPL Mobile @bplmobile.com 9823
India BPL Mobile @bplmobile.com 9843
India BPL Mobile @bplmobile.com 9746
Ireland Meteor 1 @mymeteor.ie  
Japan AU by KDDI @ezweb.ne.jp  
Malaysia Celcom @sms.celcom.com.my 19
Russia SCS-900 @scs-900.ru  
Russia Primtel @sms.primtel.ru  
Russia Uraltel @sms.uraltel.ru  
Serbia and Montenegro Mobtel Srbija @mobtel.co.yu  
Slovenia Si Mobil @simobil.net  
USA Telus @msg.telus.com  
USA EinsteinPCS  @einsteinsms.com  
USA Cook Paging @cookmail.com  
USA Satelindo GSM @satelindogsm.com  
USA Cingular 5 @page.cingular.com  
USA Cingular IM Plus/Bellsouth IPS @imcingular.com  
USA Morris Wireless @beepone.net  
USA Clearnet @msg.clearnet.com  
USA Triton @tms.suncom.com  
USA Unicel @utext.com  
USA Centennial Wireless @cwemail.com  
USA West Central Wireless @sms.wcc.net