Give friends, family, and colleagues your new number to use whilst you are abroad. You can also leave a voicemail on your existing phone number giving callers your 360travelsim number to contact you on. Alternatively, simply forward your calls from your existing mobile to your 360travelsim number.
Please note that call diversion does normally attract a small service charge from your existing service provider. You should check this with them. However it should still work out at a lower cost than receiving a call on your normal mobile number while abroad.
The best solution would be to purchase a 360travelsim virtual number from your area, and forward your calls to your local virtual number for the cost of a local call.