I upgraded my folks' 520s to 635s this Christmas still on Consumer Cellular and had to enable their APN settings, was able to just use the same SIM card.
The 635s come with 8.1. These settings worked, note that to get MMS images and videos to come through I had to choose IP type as IPv4 *only*:
Edit Internet APN:
APN= att.mvno
Edit MMS APN:
APN= att.mvno
WAP gateway= proxy.mvno.ccmobileweb.com
WAP port= 80
MMSC= http://mmsc.cingular.com
MMSC port= 80
Maximum MMS size= 10485
IP Type= IPV4
Good luck.
Thank you thank you for posting this!!! My husband and I just bought a pair of 635's and instantly fell in love with the format and capabilities of the phone. We went through the 2 hour long phone call to consumer cellular with absolutely no luck (the operator ended the call with "well you must just have a phone that can't send pictures on our network"). I am so glad that I read through the message boards and found this.
The above settings work people!!! The line that was throwing a wrench in it for me was the IP Type. After 8.1 the default setting is IPV4V6. After changing this to IPV4 I was able to successfully send and receive picture messages. Thank you johnhardyiv, thank you! I will be calling consumer cellular to inform them of the fix so they can update their "troubleshooting" software and hopefully pass this information on to others who are having this issue.
You are a life saver!
