@Hefty_kev Are you sending MMS or pure SMS ? I've seen an issue when people with iphone wouldn't receive MMS if their DATA was turned off on their phone but they could receive SMS just fine. On android, the behaviour is different. Even if your DATA ...
In your self service account, you have the option to port a number under "Plan and Add-Ons" -> "Change Phone Number" -> "Transfer a wireless or wireline number from another provider ".