Having only had a chance to test the Windows client, had to power on a cheap $10 Dollar Store phone & get to testing. Also having the plan for many months to get a build with the x86 port of Android, thus creating the ability to store them on a PC & not risking a failed android update.
"These are not POS, you don't have to keep the wallet.dat (storing coins) online to help the network & knowledge of hot / cold .dat / .wallet files is key. Keeping the user safe from loss should be the #1 priority, but that task is tough for even ones with many years of knowledge."
//The download & full sync of the GoldCoin app on Google Play, given a average wireless service provider, was less than an hour (as was the Windows test)

~Test as much as one can, you will find the ones that are really scalable & ones that are a run away train (train is still workable, but hyper-rail is the future)
