update doesn't work properly

[shawn peter]

this is my update methd

public boolean updateTitle(SimDetails contact) {
		ContentValues args = new ContentValues();
		SQLiteDatabase db = this.getWritableDatabase();
		
		//args.put(KEY_SIM_NO, contact.get_serial_number());
		//args.put(KEY_NAME, contact.get_name());
		args.put(KEY_SIM_TYPE, contact.get_sim_type());
		return db.update(TABLE_SIM, args, KEY_SIM_NO + "=" + contact.get_serial_number(), null) > 0;
	}

I need to change the type in the update method.but it doesn't change the type.There is no any exceptions.below it getcontatc method.when i get the type after updating it shows old type.

public SimDetails getContact(String id) {

		SimDetails product = new SimDetails();

		try {
			
			String query = "Select * FROM " + TABLE_SIM + " WHERE "
					+ KEY_SIM_NO + " =  \"" + id + "\"";

			SQLiteDatabase db = this.getReadableDatabase();

					
			Cursor cursor = db.rawQuery(query, null);

			if (cursor.moveToFirst()) {

				cursor.moveToFirst();
				product.set_name((cursor.getString(0)));
				product.set_serial_number((cursor.getString(1)));
				product.set_sim_type((cursor.getString(2)));
				cursor.close();
			} else {
				
			}
		} catch (Exception e) {
			
			e.printStackTrace();
		}
		return product;
	}