Error code 038 when trying to text 61054

[Janieb555]

Competition entry to greatest hits on 61054. Have been doing for some time but quoting error 038 since yesterday and says cannot send in O2.  Have restarted, have removed and replaced SIM card. Not in airplane mode

[jonsie]

Have you changed tariff recently?

Do you have a spend cap of £0.00?

Guide: Spend Caps & Charge to Mobile on O2