mobile network not available

[Fabfab1]

Mon telephone m'indique souvent réseau mobile non disponible pas de carte sim. Je ne peux ni appeler  ni recevoir d'appels ni de messages. Que faire ? 

My phone often tells me mobile network not available no sim card. I can not call or receive calls or messages. What to do ?

gt

[Martin1]

Hi @Fabfab1, sorry to hear about this.

Your post has been translated to English as this is an International forum, please post any replies in English and it will be easier for me and other users to assist you.

One thing that you can try is to check if your Xperia device works with another SIM card. Testing your SIM card in another device does not rule out a defect of the SIM card, as different devices might react differently to a defect of the SIM card. If your phone works better with another SIM card or if your card is older than 4-5 years it might be a good idea to get in contact with your network operator to swap your SIM card. 

Try this and let me know how it goes!