These FAQ might solve your problem

• How to enable handcent popup feature for the Vivo phone new Origin OS
• Filter mobile contacts / Display contacts with mobile number only?
• How to backup my messages?
• T-Mobile / AT&T / Verizon missing messages (RCS) - I am seeing message in stock app but not in Handcent Next SMS
• How to send multiple pictures at one time instead of sending them one by one?