The aim of this thesis is to implement a Support Vector Machine (SVM) on an Android cell phone to recognize handwritten Vietnamese alphabets. We use the Histogram of Oriented Gradients (HOGs) for feature extraction, and solve the non-linear SVM classifiers with Radial Basis Function (RBF) kernels. The user writes a character on the developed system, triggering the system to recognize it to output a possible list of suggestion alphabets. The resultant system recognizes the handwritten characters with an overall accuracy of 90%.