Can't update app because of billing issues

You may need to have a payment method on file, even if the app you want to download is free.

Sign in to your Apple ID account page and edit your Apple ID details.

https://appleid.apple.com

On the Sidebar click Payment methods -> then tap Payments Methods and tap Manage payment method.

See also the following Apple articles:

Change, add or remove Apple ID payment methods

Change, add or remove Apple ID payment methods – Apple Support (UK)

Add money to your Apple ID balance

Add money to your Apple ID balance – Apple Support (UK)

Payment methods you can use with your Apple ID

Payment methods you can use with your Apple ID – Apple Support (UK)

..alban67:

Should the problem involve a 'wireless carrier' in Ghana?

Perhaps there may be additional info directly from them:

• Wireless carrier support and features for iPhone in Africa - Apple Support

//support.apple.com/HT204045

Ghana:

1.The carrier, not Apple, provides technical support for iPhone in this country or region.

2.You need iOS 6 or later to use FaceTime over Cellular. You might notice decreased

performance on some carriers while using FaceTime over Cellular on 2G networks.

3.Might include an additional fee or requirement. Contact the carrier for more information.

Airtel

• FaceTime over Cellular2
• Personal Hotspot3

Globacom

• FaceTime over Cellular2
• Personal Hotspot3

MTN

• FaceTime over Cellular2
• Personal Hotspot3

Tigo

• FaceTime over Cellular2
• Personal Hotspot3

• If your payment method is declined in the App Store or iTunes Store - Apple Support

//support.apple.com/en-afri/HT203005 [other africa]

• Official Apple Support - middle east/africa

//support.apple.com/en-mide

[Not sure if these could be of use to you.]

See this Apple article: If your payment method is declined in the App Store or iTunes Store

If your payment method is declined in the App Store or iTunes Store - Apple Support

• If you still need help, contact Apple Support.

[PS: this entire discussion ~ updated only after I posted.]

Previous reply included similar link, regionalized to Africa.

• If your payment method is declined in the App Store or iTunes Store - Apple Support

//support.apple.com/en-afri/HT203005 [other africa]

While I'm not an expert, just a 'Volunteer' trying to help

(as are others in discussion forum) ~I'm curious how to

tell if your replacement SIM has been localized by ISP.

If it were blank, you'd see nearly the same effect or message.

Apple's support for iPhones in those regions, through regional

service providers; those were listed in their article, I re-posted.

Wonder if any of those, could help resolve this? ~ Probably

it's a hardware issue. IF so, replacement may be a solution.

Sorry to not have another answer; sometimes 'restart/reset'

could help; but not where it appears hardware has failed.

PS2: "If you still need help, contact Apple Support."

and it keeps saying billing problem and payment declined

See this Apple article: If your payment method is declined in the App Store or iTunes Store

If your payment method is declined in the App Store or iTunes Store - Apple Support