USING AN IPHONE 6 NOT ABLE TO SEND TEXT MESSAGE TO ANDROID BUT ABLE TO SEND TO OTHER IPHONES

Settings app > Messages > Send as SMS (turn ON)

davidfromschertz wrote:

using an iphone 6 not able to send messages to android but able to send to other iphones

There are a couple of possibilities. If it is all android phones, it means that your account is not provisioned properly by your carrier for SMS. If it is only one android phone, did the user previously have an iPhone? If so, they probably did not disable iMessage on their phone number before switching to Android. send them this link: https://selfsolve.apple.com/deregister-imessage