Iphone Issues! Cant not send texts and calls coming up "calls failing" but can receive both!

[Anonymous]

Basically as the title states I can not send texts and when I try to call out it comes up with 'call failed" but I can receive both. My phone is showing signal bars however the red sign is next to my voicemail. This happened a couple of months ago and I was given a new sim, could it be the same issue?

I have tried:

Resetting network settings

Turn phone on and off

Removing Sim Card

Putting on Airplane mode

Checking Messages settings 

When I went into an o2 shop they told me to downgrade to IOS 7.1.2 however this is no longer signed by apple so I can not do this as I get error messages. 

Help Please 

[MI5]

If you are on contract, log into your My O2 http://www.o2.co.uk/myo2 and make sure your account is paid up to date.
If PAYG make sure you have credit or an active allowance.

[Cleoriff]

@MI5  Could this be an issue with the sim card and the OP needs a new one?

[MI5]

Unlikely as everything is incoming OK, but if all else fails it won't hurt to try.
More likely to be an account issue though.

[Anonymous]

I have had the same. It's a massive fault with the iPhone. The fix? There isn't one. Read my other post!

[jonsie]

Has the latest update to ios 8.2 not helped at all?

[Cleoriff]

Wonder if its anything to do with the major outages being experienced by Apple (Just posted by bambino)

http://bgr.com/2015/03/11/app-store-down-apple-service-outage/

I know it's probably not...but very coincidental...

If you read it...it says other services could be affected.. though apple are not admitting anything...:smileywink: