Sprint 3G/4G PPTP VPN connectivity

[cb.list6 at gmail.com (Cameron Byrne)]

On Mon, Sep 26, 2011 at 10:30 AM, Seth Mattinen <sethm at rollernet.us> wrote:
> On 9/26/11 8:36 AM, Drew Weaver wrote:
>> Has anyone been able to pull any magic off that allows PPTP connectivity over sprint's 3G/4G wireless network?
>>
>> I assume they're just filtering it flat out, but before I contact them I wanted to see if anyone has found a resolution on their own.
>>
>> I have several Nexus S 4G devices which are unable to get PPTP connections over 3G/4G but if you enable WIFI it comes up instantly.
>>
>> I've been researching this off and on all weekend but wondered if anyone else had run into this issue.
>>
>
>
> I use often use PPTP on my original HTC EVO. Just tested it now and it
> worked. 3G only, no 4G in my city.
>

I have seen MTU issues with PPTP on cellular networks before with
Android.  You might want to try clamping the MTU down on the server
side.

Cameron