Though smartphones , both android and Iphone have many features, the great disadvantage remains that they can be easily hacked, and different types of spy cellphone software can be installed. In these hacked smartphones, the data can be easily stolen, phone calls terminated remotely, smses diverted and stolen and a number of other problems are being faced. In some cases, the cursor will start moving remotely and the mobile phone will be switched on remotely.
So though low end mobile phones have relatively few features, they are far more secure, and will not be remotely switched on by some stranger causing problems, and so it is advisable to get a new sim.