Simple SMS Quick Troubleshooter
Simple SMS requires a user account with a supported 2-way sms gateway provider. You can't just download the app and start using it.
Number 1 cause of misunderstandings and difficulties
You can only send and receive SMS messages via a 2-way sms gateway, after you have completed setting up your account. You must use a phone to receive a passcode to activate your account.
Number 1 cause of authentication failures
Your carrier account username and the username you enter when setting up Simple SMS must be exactly the same. You can't easily change your carrier account username, you need to change your Simple SMS username to match. This is what the Settings icon on your iPod looks like (it may not be on your main screen, page left or right until you find it).
Tap this icon, scroll down to to the bottom and tap the Simple SMS icon. Edit your username or password to match your carrier account username or password exactly, including capitalization if any.
Also check that your configured BulkSMS regional server is the one where your account is located!
Exit the settings app, then quit Simple SMS from the taskbar and restart it. Within a few seconds you should see your account balance on the screen.
IOS 6 Privacy Settings - after granting the app permission to use your phone contacts, you may need to restart your device.
A black screen indicates a failed or incomplete installation. The most likely reason for this is premature dismissal of the keyboard. You must tap 'Next' or 'Done' after entering your account details. You will need to delete the app and reinstall from your iTunes backup, carefully following the instructions in the Setup Guide.
You will get errors if you try to add country codes to local numbers. This is because Simple SMS automatically adds them for you before sending. If you also do this then they get added twice, resulting in undeliverable numbers.
Using numbers in name fields e.g. John Doe(1) or John Doe-2 will cause errors. If you can't give each of these contacts their own entry, you will have to enter these numbers manually.
Simple SMS has no access to your account details. If you change e.g. your password you must also update Simple SMS Settings.
If you use Unicode (non-European characters) in a message to a non-Unicode-enabled phone, or on a network which does not support Unicode (e.g. USA) then the recipient may see only code numbers. The characters supported on basic GSM networks can be found here.
Changes to default settings have no effect on suspended apps. You need to exit the app or restart your device to enable these changes, see the FAQ for more details.
Note: The BulkSMS regional carriers operate public SMS gateway services, and know nothing about your Simple SMS app. Contact them only for account-related issues such as passwords etc. If the above information does not help you to resolve any difficulties with Simple SMS, please see the Support Page.