SFR Internet et MMS Paramètres APN pour iPhone 5c

You can edit your APN information in your iPhone only if it is permitted by your carrier.

Goto Settings General Network Cellular Data Network

Enter APN: sl2sfr

Username:
Password:

Done. These settings are saved automatically.

Goto Settings General Network Cellular Data Network

MMS Settings

APN:  sl2sfr
Username:  
Password:  
MMSC:  http://mms1
MMS Proxy:  :8080
MMS Max  Message Size:
MMS UA Prof URL:

Also don't forget to turn MMS on: