Hi Blacklover,
The card needs to have a valid name and address in order for the payment to go through. Add me on skype if you need help with this. My id is: droidaddict7
SendHub is what you're looking for. They've got a business SMS system built ontop of Twilio that does what you need, including send/receive, subscriptions and list management.
Twilio is just an API - you'll need an interface to go with it. You can either roll your own or use something like...
For SMS marketing you'll want a telephony API like Twilio or Plivo. In order to send messages using these services you'll want some sort of interface. SendHub works well - they're built ontop of Twilio and provide a web interface that supports bulk messaging.
You'll generally want to tread with...
To get a feel for Android, try and take apart an existing app and look at its code to see how everything works. Often, people will open source apps they've made on Github. Just google for github repositories (e.g. if you're looking for wallpaper apps, search for "github android wallpaper").
As...
Hi Ben,
How long ago did you launch this app? I'm going to guess the bulk of your initial installs came from ranking in Top New Free for your category when you first launched. Then your installs tailed off due to falling off Top New Free (you get 30 days in Top New Free when you first launch...
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