do you ever notice how most of the characters seem to own an iphone? so theres obviously just the one phone on set and gets passed from person to person with a different cover on it!
what if... bianca goes into labour early (in the bush probably... miles from the hospital, even though they are able to just 'pop' in every other episode) and then discovers the baby is not premature, the dates were wrong and it actually is liams?
other scenario... sid finds out sasha is not his daughter but that lottie is and they were switched at birth like what happened with kirsty and jade the twins a few years ago. since lottie looks and speaks just like indy anyway.