The following is a list of most the SMSC's (Short Message Service Centers) around the world. These can be used to send text messages for free.
All you need to do is change the service center number on your phone (under "message settings") to one of the networks below. Don't choose your own network as you will get charged for it.
There are just a few things to remember when trying this:
If you use a network outside of your country, you will need international call roaming enabled (speak to your service provider about this).
The network you are using may not be able to send to the network you are trying to send to. Therefore it may accept the message but can't send it.
If you use a network outside your own country you will need type the recipients phone number in international format for your country because it's being sent abroad.
For example we are in the UK and to send someone we know a message for free using a forein service center we would type in the ANDORRA message center into our phone and send it to +447788123456.
The networks are becoming wise to this and are barring you from using their SMSC if your not on their network. Therefore it could become time consuming to find one that works.
Remember though, when you find one that works, keep it to yourself because the less people know about it, the better.
If You Try Any Of The Numbers Below,
You Do So At Your Own Risk!
Albania
AMC +355 3820
Andorra
+376-301004
Australia
One.Tel Australia +61 411 990 001
Vodafone Australia +61-415011501
Telstra Australia +61-418706700
Telstra Australia +61-418706800
Telstra Australia +61-418706900
Optus Australia +61-412025989
Optus Australia +61-411990000
Optus Australia +61-411990001
Optus Australia +61-411990003
Austria
A1 +43 664 0501
Connect ONE +43 699 0001999
max-mobil +43 676 021
tele.ring +43 650 09000000.
India [+91 - ]
AT&T Network of India
BPL Mobile India +91-9821000005
MAXtouch India +91-9820005446
Essar Cellphone +91-9811009998
Tata +919848001104
Command +919830099990
AirTel Delhi +91-98100-51914
Skycell Cellular +919840011003
Spice Karnataka +919844198441
Spicell +919831029222
Usha Martin Telekom ltd +919830099990
Indonesia
Satelindo Indonesia +62-81615
Satelindo : +62 816 124
Satelindo : +62 816 125
Satelindo : +62 816 126
Satelindo : +62 816 127
Satelindo : +62 816 128
Telkomsel Indonesia is +62-81100000
Exelcomindo Indonesia +62-818445009
Isle of Man
Pronto GSM +447624499955
Israel
Orange Israel +972-54-120032
Pele - ANYONE HAVE THIS NUMBER?
Italy
Omni Italy +39-3492000200
Omni Italy +39-3492000300
Omni Italy +39-3492000400
Omni Italy +39-3492000500
TIM Italy +39-3359609600
TIM Italy +39-3359608000
TIM Italy +39-338960960
TIM Italy +39-338980000
Wind Italy +39-3205858500
Kenya
Safaricom +25472500010
Kencell +254733000810
Poland
Era GSM Poland +48-602951111
Era GSM Poland +48-602951112
Polkomtel Poland +48-601000310
Polkomtel Poland +48-601000311
IDEA Centertel Poland +48-501200777
Qatar
QATARNET +974 5589955
Reunion
Reunion +33609001390
Romania
Connex Romania +40-92004000
Dialog Romania +40-94946000
Cosmorom (1800 MHz)
Russia
North West Russia +7-8129600096
MTS Russia +7-0957699100
BeeLine +7-90173100
Rwanda
+25008110333
Saudiarabia
Sauditel +966 5 503 1999
Serbia
MobTel +38163100100
MobTel +38163100200
MobTel +38163100300
MobTel +38163100400
MobTel +38163100300
PTT Telekom Serbia +381-650000900
PTT Telekom Serbia +381-640000900
Seychelles
Airtel: +248700000
Singapore
Mobile One Singapore +65-96845999
Mobile One Singapore +65-96845997
SingTel Singapore +65-96400001
SingTel Singapore +65-96500001
SingTel Singapore +65-98189999
SingTel Singapore +65-96197777
Starhub +6598540020
Sweden
Comviq Sweden +46-707990001
Comviq Sweden +46-707990002
Comviq Sweden +46-707990003
Comviq Sweden +46-707773078
Europolitan Sweden +46-708000708
Telia Sweden +46-705008999
United Kingdom
Isle of Man Pronto GSM +447624499955
Vodafone UK +44-7785016005
CellNet UK +44-7802000332
Virgin Mobile UK +447958879890
Orange UK +44-7973100973
Orange UK +44-7973100974 internal
One2One UK +44-7958879879
Guernsey Telecoms [+44-4481/7781]
Jersey +44-7781
USA
Aerial Comms USA +1-8132630025
Aerial Comms USA +1-2812350025
Voicestream USA +1-2063130004
Pacific Bell USA +1-2099042010
Pacific Bell USA +1-2099042020
Pacific Bell +1-2099042030.
Powertel USA +1-3343338200
DigiPH PCS USA +1-3342090307
Omnipoint USA +1-9179070004
Sprint USA +1-7044100000
Washington PCS USA +1-410258953