My phone won't change to horizon format when texting phone messages but will in email and searches. It makes me crazy to text w one finger what is wrong!!?
reset all settings, or txt with 2 hands.
settings>general>reset>reset all settings this will wipe out any wifi connections you hav and will restore your wallpaper/ringtones to default but you will not lose any data.
if that doesnt work you can always restore as new =)
Retrieving data ...