Securing your is the most important. Login to your wallet on different phones is not too idea, if you will do that, make sure it's your phone, else you stand the risk of been hacked.
Mostly some apps have a watermark on their front. When people use it they don't want to come the watermark on their front. So, they just download a crack for it, and when they download a crack for it, it requires their email or some malware that simply hacks their laptop, their mobile phone, or any other device they are using. In this way, most of the users are being scammed, and their wallet passwords which are stored in their email stolen.